Explanation of a how air pressure switches operate in gas furnaces and water heaters.
Пікірлер: 31
@Silent-Lucidity2 жыл бұрын
This video helped me diagnose a bad inducer motor. Couple hundred bucks and 30 min later we have heat! Thanks!!
@jimbarron868811 ай бұрын
Did you check the inducer capacitor first? Sometimes they go giving the impression that the vendor motor is bad.
@johnwhitehead81296 жыл бұрын
The video was helpful. Easy to understand!! Much appreciated
@keytothegate6810 ай бұрын
When he said there is no way to tell the pressure inside the pressure switch unless you have this special tool (600 bucks) ... Well they need to update those things to look more 21 st century than mid 20 th. They could have built in digital gauges or a universal port to give you a better understanding of just what your furnace is doing ?
@julioquintero99366 жыл бұрын
Excellent video
@PBS-nm1uu5 жыл бұрын
great presentation thanks
@josephengert25046 жыл бұрын
Just an update from Lennox. They don't warranty if you want to be proactive. If you DIY your pressure switch because there is a problem and then phone the company for warranty they will not warranty the switch. So let your house freeze, pipes burst, etc. then phone the company even though you know that there is a problem.
@edwardaddison13315 жыл бұрын
Joseph Engert can you short across a furnace pressure switch to check if it is the problem
@jeremyhenderson1634 жыл бұрын
Thanks for sharing, very informative. Not sure if I'm looking at the right component for my DIY project, I need an in-line component that can measure a gaseous pressure and connect/disconnect a power source based on the parameters of the component?
@nikex2197 Жыл бұрын
I have yet to see a video that explains the function of the 2nd p.switch. It is set higher than the first on on my American Standard (Trane) furnace. I can only assume that the pressure from the inducer motor must run above the lower limit to indicate adequate air flow, and below the upper limit which might indicate a blocked output.
@jimbarron868811 ай бұрын
The second pressure switch has a higher setting which closes when the thermostat (or circuit board of furnace) calls for high heat. In this case the ventor motor goes to high speed creating a higher vacuum. This closes the high fire pressure switch. The board then energizes the gas valve to the high fire output, typically 3.5"wc. Finally the board energizes the high heat blower speed to maintain the heat rise across the heat exchanger. Furnace runs on high fire until satisfied.
@calgibs69119 ай бұрын
Its because its reading what the inducer motor housing ganna pull more thats not a two stage valve or inducer
@canuck-guy23842 ай бұрын
I have the dual switch as shown in the video. My question is when I checked the switch on the right it showed continuity with the inducer motor running. The one on the left showed no continuity. In the meantime my furnace motherboard is flashing that the limit switch is the issue. I checked it for continuity on the limit switch and it is good. Help!
@jackpine434711 ай бұрын
One other issue can leave the pressure switch stuck in the open position - debris in the air tube nipple that the tube attaches to on the inducer motor. Our Goodman furnace was blinking an open pressure switch code on the controller board. After determining the correct voltage was reaching the switch and that the air tube was not leaking, we then tested that the switch could close by sucking on the end of the tube and checking for continuity through the switch. As a final test we turned on the furnace power and sucked on the air tube - the diagnostic light on the controller board stayed lit, indicating no other issues we could detect without testing the switch with a manometer. Rather than opting to climb up on the roof to check the chimney next, we took a stiff, thin wire and reamed out the air tube nipple on the induction motor - it felt a little crunchy! We reconnected the air tube, and lo and behold, the light on the board stayed on and the furnace ignited! So, before inspecting the flue for a blockage, clean out the air tube connection on the induction motor.
@tonypresley95345 жыл бұрын
Thanks
@calgibs69119 ай бұрын
I tested a -.10"wc on a goodman system yesterday tested the collector box cover was reading -.17"WC but the voltage was fluttering on the switch even thoe it was over manufacturing rating so i have ordered a switch see if thats whats up
@daltonc8109 ай бұрын
Goodman pressure switches are garbage, replace it with a universal matched to the correct water column
@danielkilbourn49616 ай бұрын
Are both pressure switches the same?
@jasonkeuma19865 ай бұрын
They have different ratings. (Normally) Example. One might be -1.05” and the other might be -0.40”.
@stooges19516 жыл бұрын
I just made a order today 11-1-2017 for a pressure switch
@user-wo1mn8yg5i9 күн бұрын
What about the other switch
@johnaries9301 Жыл бұрын
Can you wire an air pressure switch backwards?
@jimbarron868811 ай бұрын
It's power in and power out. Doesn't matter.
@user-dd9ni5bg2i5 жыл бұрын
Жаль на русском языке нету видео. А то у меня проблема с реле разряжения
@rfbedell347 Жыл бұрын
Do NOT buy anything from this Sham of a Business. They offer NO warranties nor any customer service.
@Ramone466 жыл бұрын
Hi I have a question. I own and operate my own HVAC company and you have no idea how many service calls we go on and find out that a customer has tried to do the work on there own. My question is why are you selling parts or even pushing a customer to buy their own parts when we all had to go to school and to be certified to be able to work on any equipment ? I'm sorry to say that this path really hurts our industry. John F. Pres. Rams Heating LLC
@MEMPHISBIGC6 жыл бұрын
Get over it John.. I'm certified. HVAC stores are a rip off, I bought a control board for my Rheem RGDG model. Crooks charge me $237.00.. because I didn't have an account with them. I could have purchased it online for about $125.00. People who are ordering online are certified too !!!!!! Johnstone has best prices on from store purchases , but did not have the Rheem part that I needed.
@johnwhitehead81296 жыл бұрын
One question Pres., how does it hurt your industry when a HOME OWNER messes up their property(unit), and then calls a professional to fix it, if they happen to have failed? Isn’t that called job security? I wouldn’t know though, I’m a flunky and have been for years. I’ve been known to sweep the aisles in your local department store, after closing hours of course!! Y’all hiring?
@Ramone466 жыл бұрын
Hi. As many know that pressure switch are funny and if they are not the right ones or handle correctly you will be buying another one. It pains me when every year I have to re new my city, State and my insurances for my company in order to purchases equipment, parts at whole sale. It also pains me to have to do a minimum of 40 hours a year of on going training when a person can go on line these days ? There is an old saying see me now or pay me a lot later.. John
@jeffseefeldt84915 жыл бұрын
Tough titty! i had this same part weak in my furnace a repairman came and blew into the tube going to it then the furnace worked!!. He still installed a new pressure switch still but he was not sure which one was bad of the two & charged $100 for a $20 part on ebay i learned so i bought a spare to keep handy and a year later my furnace acted up the same way and i changed the other switch myself without a $100 part & $120 labor bill. It pays to watch your repairman closely and learn from them. It is not rocket science to turn 2 screws and plug 2 wires into spade connectors and attach the hose line to swap this part out
@LanceMcCarthy5 жыл бұрын
Customers pay for your experience and diagnostic skills. 8 times out of 10, the person will buy the wrong PF rating and have to call you anyways.