How to Diagnose and Fix No Heat Issues - Also a Demonstration on How Car Heating Systems Work

Watch this video if you don't have hot air coming out of your air vents. I go through the most common causes and show you how you can fix them. Also I demonstrate how your cars cooling system works with also helps greatly in understanding how the heating system operates.
Spill Free Funnel: amzn.to/2b0JZqC
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Please Consider Supporting My Channel at : / rnwdue to factors beyond the control of Ratchetsand Wrenches, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. Ratchetsand Wrenches assumes no liability for any property or personal damage that may arise from doing a repair on your vehicle after watching any of my repair video's. Due to factors beyond the control of Ratchetsand Wrenches, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Again Any injury, damage or loss that may result from improper use of tools, equipment, or the information contained in this video is the sole responsibility of the user and not Ratchetsand Wrenches.

[@jayprogramming5102]

You are a lifesaver! Winter just began in here and I had no heater whatsoever and never knew where the water sound was coming from when driving. I watched a lot of videos and no luck. This morning I watched your video and took the air our as you explained. Boom! the heater is working as new and I didn't spend a dime. Thank you so much!

[@oilsmokejones3452]

The most complete video on this. I thought I had a blocked heater core but just had to bleed the air out..very helpful.

[@TightWadDIY]

Great video. Very informative. I’m hoping mine is just low coolant!

[@1533ramsay]

you're the only one on KZbin that mentioned about hearing a swishing sound in the dashboard of my car. Which I've been hearing for about two years never knew it was air bubbles in my heater core. Thanks for the great information

[@JasmineCherie]

Mark Hoffman same here!!

[@Juice-jx1pr]

For two years

[@breannalakin3747]

What does bubbles in my heater core mean

[@icemancometh8679]

@@breannalakin3747 you need to bleed the air out of the system - somebody that's familiar with working on cars should do this - there's too many moving parts and chances of getting hurt.

[@hfuhruhurr]

@@breannalakin3747 If you hear sloshing that means there's air in the system. There shouldn't be any air in the system. Kinda like a full 2-liter bottle of water...if you shake it you won't hear sloshing because there's no air. However, if that bottle isn't filled completely then you can hear the water sloshing around.

[@rockinmagic2000]

Thank you Sir. Best video on this I've come across. Much appreciated.

[@jaysilverheals4445]

excellent video but a note to help people whoes heater blows cold sporadically or at low rpm. HE FORGOT TO MENTION THE COOLANT TANK OFF TO THE SIDE--that tank must be clean and not clogged and the hose going in under the radiator cap must be pristine and sealed. That tank is not an overflow tank--the engine draws coolant from it and backflows it back and forth as the engine runs. If that tank becomes dry or clogged THE HEATER GETS AIR LOCKED--ITS SUCKING AIR. Good video but it was an honest oversight that he forgot to mention it. I suffered for five years blowing occasional or constant cold at low rpm. I cleaned my tank and YOU MUST POUR COOLANT INTO IT--fixed my problem instantly as I was about to spend hundreds on heater core replacements etc.

[@adrianguzman614]

Thank you for this video, very very helpful.

[@zhookeeper]

Awesome video. Great information, thank you:

[@paulpatriot1776]

Thank you!!!!!! I have the sloshing sound in my 2005 Nissan Sentra, heat works when driving, but cools down when stopped. A mechanic said I need a whole new heater core! I am going to try to purge air tomorrow. Thanks again👍

[@samm88724]

Awesome VD!!!!!I l will try these steps on 2000 Civic LX got no heat after heater core hose replacement. God Bless!!!!

[@davidlothery4045]

Not a bad video at all, very good job man thank you for posting.

[@revluff]

AMAZING video thank you for this

[@mikearnold3328]

great info and well explained....thank you

[@bilygates2509]

Just fixed it 👍👌❤️, thank you so much.

[@STRUMMERBOY1975]

Hi Great Video! And i have a question... My 2008 Elantra has a heating prob.... The Hold/ Cold dial does not do a bit a difference when set to cold or hot..... as it is always hot.... and not as hot as when working properly....

[@jjnicnic6098]

Great information, you know what your talking about, thanks

[@normaalvarez1355]

Damn You actually know what you’re talking about thank you so much I appreciate it ! Great video

[@Elwooddudes]

Great info! Thanks

[@hiboy39]

Nice video man, I will definately be trying some of these tips when it's not to cold outside!

[@myRatchets]

Hope it helps you out, thanks for your comment.

[@karmaline]

Great video!

[@sunsteve1]

Hi, RnW I have ford expedetion 2002 5.4L had problem with heat. when I turn the switch control to Ac is blowing cold air,then switch to heat still blowing cold air. the next day I check the blend door actuator or blend door it self it seem working properly. the heater core is brand new, and also the rear heater is working properly and blowing hot air but the front heater isn't. do you have any idea what wrong and what other option need to be check? thank you

[@My65isblack]

Good info thank you. Now what would it cause the bubble issue in 1st place

[@jackhollins2633]

helpful video .thanks

[@hailepaulos7920]

thank u man. it was very interesting.

[@luckylifeonwheels626]

awesome video thx

[@AG-rx1bo]

Thank you for the video. Very helpful.

[@myRatchets]

+The Garrison np, thanks for commenting. cheers

[@pablocastellano4481]

Very good video....

[@kyleschori955]

Recently when I stop at in a parking lot my system starts blowing out cold air. I do hear water running around from the dashboard (heater core) sometimes. The last time I purged it I must had not removed all of the air out. Thanks for the tip.

[@carlosrios8920]

Great video man! I changed my Thermostat and its lower and upper housing Original MOtorcraft for my 2003 FORD EXPLORER and still NO HEAT man! Also, my HEATER CORE was extremely hot. ANy advice, thanks man!

[@amjit31]

What ended up beig the cause of the issue?

[@huntercline5630]

I watched this video and I got my jeep fixed thank you my guy #1

[@huntercline5630]

Remi

[@ciscogonzalez8653]

I have a 2004 Pontiac Aztek I was wondering if this car has a lot of issues I've had this car for a year and I had to change it tight rod now and then change power steering pump and then my rack of pinion broke right in the middle so if you have any ideas how that happened or any other issues about these cars I sure appreciate it if you would let me know or make a video out of it I sure appreciate it thank you

[@roberthinshaw1503]

Thanks for another awesome video! You fix all my problems!

[@myRatchets]

+Robert Hinshaw haha nice. thanks for commenting.

[@luisbernal7086]

@@myRatchets question is if it does get heat after a while or when it's running what would it be?

[@leepopaz253]

@@myRatchets hey, if disconnecting heater hoses to flush out crap, ud have to do a burping /bleeding getting out bubbles?.

[@shuriKen469]

enjoyed that warning bit. don't get burned y'all!

[@MrMeanderthal]

got my Astro Van heater working now thanks to your video instructions!

[@grahammorris738]

Yes my heating is awesome now thank you 👍👍🍻🍻

[@lucaswatkins9896]

I have a 1994 BMW 325i. I didn't have heat so I replaced the thermostat and water pump and now the heat works somewhat. not at an idle whatsoever, but if engine is maintained at 2500-3000 rpm heat comes out very hot. is this air in my system or a heater control valve issue

[@StyngRay1]

2007 Toyota Camry v6 xle. no heating, only cold air blows. now there are rapid temp spikes occurring intermittently. Water pump was replaced last year. What is the most probable cause? Thanks.

[@milkdeal]

Squeezing the lines to heater core worked on my 1994 Buick Century. Thank you!!!

[@milkdeal]

I will flush tomorrow!!!

[@torrescesar71]

i replace the heater core in f150 03 after putting everything back the ac/heater only blows air from the the defrost vents regardless if where i change the settings.any advice

[@dillonparent4483]

Blend door motors are bad or doors are stuck

[@FattestKidEvvverr]

I like this video

[@burtonh1]

It is strange, sometimes the heating in my car blows cold air other time is works as it is supposed to. does anyone have an answer as to what is causing this inconsistency?

[@mitchellbell9807]

changing heater control valve on a 98 Ford Ranger took it off many years ago and there is a arrow on the valve where where does which way does the arrow point on the valve what line does it go into

[@MrSpanosal]

Hi! Disturbed (best metal) and mitsubishi (best heavy machines) xaxxaxa but 1989 1998mitsubishi garland 24valvides, nice video. Thx!

[@ricks_life2046]

I have a new water pump, radiator, thermostat and head gaskets. Blows heat while driving some, but stopped it's cold. Any suggestions....

[@mariogarduno2670]

My 2005 camry le is giving me no heat now. Both metal lines going to the heat core are warm . Any suggestions what could be the reason.? Checked antifreezer hoses etc

[@JustMe-yy7uc]

Hi there , what's about toyota rav4 xt3 2004, half of the car is blowing cold and half warm! The driver site is blowing cold! Hope you can help me. Regards. .

[@nealarnett2842]

Thanks for help! Just changed water pump. No heat. Did not know about air in heatet core. Followed your instruction and almost instant heat back. Thanks!!

[@myRatchets]

+Neal Arnett Nicee, glad to hear it helped you out. cheers

[@mitchellbell9807]

how to change a heater control valve on a 98 Ford Ranger

[@evan937]

@@myRatchets Help! I drained and re filled my 2000 Corollas Radiator with Toyota Premix coolant today. I ran it for 20 minutes with the cap off and heater going. The temp gauge never went past half but my heater started blowing cold. I shut it off after. How long does it usually take to burp the air from the system?? What should I do? Im scared i did somthing wrong.

[@geebobwiz]

thank you

[@winprbrache61]

I have a pick up Dodge ram 1500 2003: after the pick up is warm , with the fan of heat comes out but, when I turn on fan in low speed 1 heat star reduced and regular air star coming out. What's could be the problem? I change the thermostat and works same?

[@alexsaavedra2512]

Any video on how to change heater core 2003 Subaru wrx?

[@jesusmoya1575]

hey great video. have a question 2003 dodge durango have some heat very little. and the thermostat fluctuate from regular temp to nothing at all from time to time... what do you recommend I look at? @ratchetsandwrenches

[@jesusmoya1575]

+ratchetsandwrenches

[@rosiasteagall1410]

When is my heater blowing hard and everything but it's just not getting hot enough how do I fix that and what is it mean when your let's know things laid up and the thing that goes around the circulation thing is light up to how do you get those lights off

[@MuscleBlend]

Great Video. You saved me big. My TDI Passat had air in the anti-freeze system and it was dramatically effecting the heat output. Your technique work great. Thank you.

[@myRatchets]

Awesome, very to happy to hear. Cheers

[@trenton2149]

what is it if i have heat coming from the passanger side vents but cold air from the driver side vents an that happens when i have the heat on what is it an how can i fix it

[@hectorrocha8626]

triple Cat an more it called a temp door or bled door depends on the car it control the doors in the vents that allow what air comes out

[@jims2507]

Just buy a spill-proof funnel. It makes it possible to bleed the air out of the the cooling system without too much trouble, and it has a rod with a stopper on the end so you can put the extra coolant back in your bottle! I can't recommend it enough!

[@ayred12]

My car won't blown heater while on idle or stop signs its only blows cold air but once I accelerate I feel heat air coming through just only when I accelerate and this just started like two days now...after having my intake manifold gasket done by the Toyota dealer(I have 2008 Toyota corolla)what do you suggest sir..? any help would be highly appreciated

[@Guzzilunatic]

LOw coolant level in the engine cooling system. When the engine is cold, check the level.

[@eddiecruey9989]

Water level is low

[@jaysilverheals4445]

OUCH!!--ALL THE ISSUE WAS IS THAT THE PLASTIC COOLANT TANK OFF TO THE SIDE WAS DRY AND OR CLOGGED. That is not an overflow tank--the engine when started suctions water in and feeds it back out as the engine runs. If you blow cold at low rpm but heater works fine on the highway or by revving the engine the HEATER IS AIR LOCKED. At higher rpm-s--the force of the water overcomes the airlock and forces some hot water through. That coolant tank must be clean and the hole in the bottom and the hose to below the radiator cap must be clear and hose pristine and totally sealing with no damage. Your problems would have been solved instantly for free. I have uploaded a brief amatuer video showing the tank and how bad mine was. I agonized for five years and cleaning then FILLING THAT TANK WITH 2 INCHES OF COOLANT FIXED IT INSTANTLY. I now blow hotter than hell air at an idle and it blows hot even before the needle registers the engine warming up. Thanks hope this helps someone

[@safiuddinsyed321]

My 2001 Toyota Camry doesn't heat up from a cold start, the gauge remains at the bottom. Also, it has a check engine light ON. Will it go away if I replace the thermostat?

[@cesarsalazar2324]

Thanks

[@nardoglesby1751]

Thanks just fixed my heat for free....

[@crochetbabe829]

No heat in my Saturn/Aura. I'll check the antifreeze first before heading to the shop. Thank youuuu!!

[@MrHoneybeeScratcher]

QUESTION: my heat continues to blow out the vents even when put on floor. It blows out floor but still blows out vents. What can be the issue?

[@donDiegoEstebanMgLKenNDJohnson]

Dampers

[@colleenmacari7250]

What could cause the heat to become cooler when the blower is turned to high?

[@bfc1425]

nice video my car heat is on but heat but sometime it goes out

[@gamingdaddy1019]

Well that’s a subscription

[@vanillacokejones8320]

If I drove through a lot of water and then that night it froze, will that solve itself and just drain out? Right now I can feel a trickle of heat

[@ameehasa5504]

Thank you a lot I do same as you mentioned here I found that no have enough water in the radiator so when I drive high speed some time came hot air ,,so I add water and keep it running half hours,,God bless u

[@wandadunn9386]

Amee Hassa

[@youngsurfangler869]

I have a 2008 dodge caravan and my temperature gauge rises to H then slowly makes its way back down to C. My heat still works fine and I’ve also changed my thermostat. Anyone have any ideas what it could be?

[@brandonkozfkay6950]

I can warm my truck up for 15 minutes drive it 20 miles it will blow cold. Once I stop and let it idle and sit for 10 minutes it will blow warm. Once I go down the road it usually gets cold again. Not always but usually. I replaced Heater core and thermostat. Both hoses to heater core are warm. Fluids are full. Only hose thats cold is from radiator?

[@sandramaltos4037]

2002 Lincoln Navigator heater blows cold air replaced thermostat and module how to fix it

[@bobbyroman8439]

Where are the plugs located on the motor block in order to empty the coolant!

[@rashkookurde9520]

Hi I own the 2011 Toyota RAV4 and the problem is in winter the driver's side air is hot but the passenger side is cool. can you help me. Thanks

[@rashkookurde9520]

For your information the car is base model

[@ericluu7806]

I have a audi q5 2012, after I replace water pump, I drain coolant. Now I notice my driver side near door comes out hot air, middle vent and passenger vent blow cool air

[@Cordalemark]

OK I have a 2007 ford f-350 it can sit out front all day and it blows cold air when I drive it it blows hot air when I stop at a red light or coast down hill it blows cold what could this be ?

[@levimarenda7669]

could be the blend door that controls the mixture of hot/cold air. sounds like the control cable for it broke loose, so the door flops around, changing from really hot to cold on its own. when stopping or going downhill the blend door may move forward and close completely, and then flops back when accelerating or going uphill. thus leads to either hot or cold extreme conditions.

[@Cordalemark]

+Levi Marenda my blend door is electronic and seems to work I can hear and feel the air change when I change from floor or defrost or other settings as well I'm going to take it to the mechanic shop for a diagnosis when the weather gets a little cooler thanks for the help though

[@edwardjerome8511]

had same prob so I checked to see if I had air bobble so I backed down hill and left cap off till fan came on and off 2 time and squeezed hose few times to get air out of system =did not work it was my water pump thee blads that push thee water threw the system were worn out so on idle no hot air till I started driving =hope this helps

[@k_llavybzproductions9274]

My 1999 Mitsubishi Eclipse isn't blowing air at all what should I check in this cadse?

[@daveydavis3167]

Changed radio on a 04 subaru forester and heat no longer works, and think knob for temp contol aint working

[@myUsThailife]

it to Toyota's dealer. They said the problem is air box not switching inside rec. need replacing air box and cost about $2300 so expensive. I wondering if anything else I could do beside that. please help. Thanks.

[@Saidoromo2024]

to take to small local repair shop

[@myUsThailife]

Thank you.

[@DavidMortaz]

1st time I heard anyone mention the sounds of water gushing in the system due to the air being trapped!! Will have to trying bleeding the Jeep Grand Cherokee which only blows Cold air. Can't be thermostat cause the Temp display shows enough heat.

[@com2129]

Is that a Sony Xplod head unit?

[@barbararohlman57]

my heat dont work and thay said i need to repace hoses and antifreeze flush

[@sandervdw1784]

Guys I have a problem with my Rover 25 heating system. Ive replaced the thermostat, Saab valve and heater radiator and still no hot air. Ive checked the two hoses that go to the core, theyre both hot. Could there be an air lock somewhere? I really have no idea what to do. Car has no AC and all valves for adjusting the air flow (windscreen, towards driver, passenger etc) work. All help is welcome, thanks in advance.

[@newwavepressure6478]

Did u ever fig it out

[@raymondmims3457]

Also check the thermostat under the hood replace it.

[@wilfredomercado5090]

heat blowing out of one side not they other and a click click sound coming behind the control panel

[@yawglausnorthpole8003]

my honda pilot 2004 heat is not hot so what is wrong ?

[@drwatson1234]

Your video quality is great. What kind of camera do you use?

[@myRatchets]

Its just a Cannon I got from Walmart. The Audio on it isnt that great actually. tx for watching.

[@sealteamryx6758]

my heater only works when the RPMs are up do you think that could be a clogged core?

[@Back2Naturr]

Jack Meehoff did you find out the problem?

[@mckinneytexaszeds5922]

Did you find out the problem?

[@DJOpaixMusic]

did you find out the problem?

[@jaredhughes603]

Did you find out the problem?

[@newwavepressure6478]

@@jaredhughes603 did u find the problem i have the same one

[@kali_g8578]

My 2000 Chevy 1500 takes a while to warm up, and I don’t feel that much warm air coming out the vents. Why is that??

[@edykhan6618]

Kali_G8 he literally just took 10 minutes to explain !!!

[@kali_g8578]

Edy Khan smart guy

[@bobbyroman8439]

Make a T-shirt with your LOGO!

[@ramza813]

any Jeep liberty circa 2011 owners? gfs jeep blows hot for a sec then cold. bleed the air like in this video? will that save us (me) few hundred at the mechanic?

[@auntie03220]

My 03 Tahoe has no heat blower is good resister is good I feel heat but won't blow out

[@josealamo418]

I like how fun days could end with a tip of a funnel....lol

[@noahconder9209]

6:29 got the like from me lol

[@noahconder9209]

06:30

[@harlembeloved7052]

What if it doesn't turn on at all

[@thomasstreetman6350]

The flapper door is located in some God-forsaken place. LOL!!

[@keithambrose1854]

Lol in other words a shit job to fix.

[@adventuresofperseus945]

Gawd forsaken place...sounds about right

[@wceejaay64]

What if only one side of your ac heater works

[@Keeslonkf]

Actuator door is stuck. Have to get in the dash to fix

[@mariomm9080]

i bled air in my cooling system and got my heat back ,but then some weird noises started coming from the heater core it sounded like some rat was there

[@jameswilson1961]

My heat not blowing air

[@dr.phillnaadoftennessee.9788]

When the f*** did the antifreeze become coolant LOL...

[@pwc1021]

Lol, my vehicle has the same failed hood struts problem....see you needed a piece of wood to prop up hood.

[@ExtremeRecluse]

I bought a cheap radiator from EBAY. It started leaking after 5 months.