Thermostat wiring, by loudepot

Learn what the letters on the back of your thermostat mean, Like these videos? just type in loudepot in any APP store, and for .99 cents you get a lifetime of fantastic tutorials, updates for free every month..forever, thanks Loudepot!!

[@mathewwilson2286]

I have probably watched 15 videos on thermostats and this is by far the most straight forward. Thank you

[@ookauk]

good to know tks

[@dagwoody]

Thanks for your time and good teachings.

[@eldangoy]

thanks, your knowledge was critical to me backtracking my errors in installing a smart thermostat in my 55 F home!

[@fleddd1]

Very comprehensive instructional video. Thanx ......Keep up the good work.

[@guelo64]

Lou thanks, great tutorial, very understandable.. Stay blessed, guelo

[@basschica]

Great explanation, thanks!

[@loudepot]

It's easy enough, G is fan, Y is air conditioner condenser, W. is heat, RH is usually hot red wire for heat, and RC is usually red hot wire for air conditioning

[@richardpatterson4312]

So by your own admission, R is the feed. Not the return, as stated in the video. You can't supply 24v and return it with the same wire. The red supplies 24v the g,w,y return that supply(if the thermostat calls for it) and then deliver it to the fan, heat, a/c. The C is a common. Meaning common to ground. So between r and C you'll have 24v. That is where your thermostat takes power from to operate. Or it uses batteries or both.

[@dr.easymode5345]

Thank you Lou. Very well done.

[@saintkocila5171]

Thank you for posting all these very useful a d helpful knowledge. Thank you

[@loudepot]

Keep in mind. If u just have heat. U can easily twist any 2 wires together until the heat goes on forget about the tests a for now, because that's all the dam thing does anyway, so lets figure what 2 wires fire the furnace, then ill figure out where they go

[@mmfalso]

Thanks for responding Louis. My current therm has Black to 1, Green to 2, White to 3 & Red to 4. If I just follow color of wire (which instructions on new therm say not to do) I would put red to RH (I dont have air) Green to G for fan, White to W for heat but where does the Black go? It was on 1 before, what ever that was? Thanks

[@mmfalso]

Here are the codes on the back: PC8900 A 1007 (1) bar code 08526715241 0427 49357 207573B REV. bar code This thermostat has numbered not lettered screws Currently Black to 1, Green to 2, White to 3 & Red to 4 New Honeywell RCT8100 has Rh Rc W Y G terminals Where do my colored wires go?? New instructions assume old therm has lettered terminals and says to ignore wire color?

[@awesome_mobile_accessories]

thank you so much sir useful in my work

[@loudepot]

Are you sure you have a 24 volt system, because there are also line voltage systems (120volts) that would change everything. Make sure you know what voltage the system is

[@loudepot]

Find out where the black wire is on the furnace, I assume its hot air ?

[@RODRIGUEZ13005]

Very well Explained thanks. but I have 6 wires in my old thermostat R,W,G,Y1,Y2, and C. Where C goes? In my new Thermostat there is no any letter C

[@judasbegay9515]

White wire w/ red stripe running with red wire from cooler hooked up to red wire on a/c thermostat for RV

[@urnzwayzmoove]

Good Stuff!

[@Pinozcyclezandridez]

I've got my blue with yellow on the y on my old mercury thermostat. How,would I wire that to digital

[@julianperez8749]

my new thermostat has w2 w1? my old thermostat has w wire? can I use w1 on the new thermostat?

[@davidkirkland1392]

cool thanks

[@robvoyles]

Why did you use the term shorts out....

[@cheeseball247]

I have a black wire... What the heck is that for...

[@atiqsmail]

I was trying to install a new 5 wires thermostat replacing an old 4 wires. I used extra wire as c wire but the furnace terminal board side already has a wires attached to it(C and Y), which runs to out side compressor unit. when I attached the new run c wire to this c terminal it is blowing out my 3 amp fuse. where should I connect the c wire of the new thermostat then?

[@loudepot]

+M ATIQUE Use Y for the compressor

[@richardpatterson4312]

The red is the supply, the hot, the potential. Not the return. There is no C in your explanation because it's not absolutely necessary, because the W is the return for the heat, the G is the return for the fan, Y is the return for the ac. Now, the C is the neutral, so between the R which is hot and the C you'll have 24v. That is how you connect power to your thermostat so you don't keep running thru batteries. Speak accurately.

[@6789tony1]

Nice

[@ronniemartin2006]

i have e/aux/y/g/o/l/r/b/c all i need is a/c for my kids i wrote down everythang you where teaching and studyed please text back am afread this mit chaught on fire for air

[@MultiJibb]

evharisto patreedah!!!

[@aricunono6272]

You Made this so simple.. it ain't even funny..

[@Hill_null]

Oh no you forgot about O

[@adamberkey8880]

No my thermostat terminals are numbered not lettered. Why does nobody on youtube have a video for numbered terminals?????

[@robvoyles]

what make and model stat do you have?

[@berkeyfamily9828]

@@robvoyles I hired a heating company to hook it up...

[@عوفحرب-ج4ن]

good v good

[@jshivprashad]

Great video Lou. However maybe you should have shown that the hot and neutral from that outlet coming from each side rather both from the same side.