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furnace

  1. HVAC
    When I turned on my heat last couple days, the HVAC would kick on and then off again. When I removed the panel, there was water leaking from the exhaust tube (where that connection point is). It is a high efficiency HVAC (Lennox 5 years old). My guess is that one of these 2 areas is clogged...
  2. HVAC
    Hello, I hooked up a new thermostat which required the usage of a Common wire. Being the idiot that I am, I removed the whole house humidifier wiring (Honeywell HE120) from my furnace (Lennox Airflow 92AF1UHxyz) and didn't take a photo about two years ago. <face palm> I posted on here then and...
  3. HVAC
    Hi there. My furnace is making a humming sound shortly after it turns on. The sound stops shortly after — while the fan is still running and pushing heat. Any ideas why or what is causing the sound?
  4. HVAC
    Here’s a video of what’s going on IMG_4560.MOV
  5. HVAC
    My honeywell wifi thermostat went blank while my heater was running yesterday and now my unit just blows air (no heat) and I can't shut off the unit unless I unplug the York furnace. Here's what I've checked so far but still can't figure out what's wrong and the cause of my blank thermostat...
  6. HVAC
    Hoping someone can help. Current furnace is sitting on top of 17.5 in box plenum. The furnace is old and undersized. The a/c coil is newer and is 21 inch. Looking to purchase 21 in furnace. Newer furnace is shorter by about 6 in. Can I use the existing 17.5 in box stand and build a transition...
  7. HVAC
    Hello. My furnace displays a 12 fault code. I've replaced the pressure switches, control board, flame sensor, and limit switch, I have a new capacitor and a new ignitor to swap out the respective components. The sequence: a call for heat will initiate the blower, in about 90 seconds the ignitor...
  8. General DIY Discussions
    Hello! I have built an electric furnace using an Auber Instruments PID temperature controller and an AC contactor. I have been testing it using a K-type thermocouple. I have run into a problem: I will program the controller to ramp to 1832 F from 50 F over 90 minutes, hold at 1832 F for 15...
  9. HVAC
    I did a DIY replacement of an electronic gas valve in my aging trane furnace last year. I used rector seal on all the joints, and did a gas leak check using soapy water(all passed). The furnace operated for a few weeks before the weather started getting warmer with no issues. Fast forward to...
  10. HVAC
    I have an older Williams wall furnace in the middle of my living room where the intake air blower is at the top at roughly eye level behind a 14"x18" grill. The fan was just replaced this year and is in perfect working order, but it's just annoyingly loud when it's running, which is a fair...
  11. HVAC
    Hi looking for some technical help with our HVAC system. I just replaced the blower motor in our furnace and it is running constantly since the change. I’ve disconnected it from the thermostat to isolate the problem and it still fires up as soon as the power comes on and stays that way with or...
  12. HVAC
    Day and night - N9MSB0802120A1. Roughly 6 years old. So my limit switch keeps tripping. I used a multimeter to verify that it reads 24v when it trips. I also tested continuity and it was good. I removed the limit switch and used a jumper to keep the furnace running while using a meat...
  13. HVAC
    Putting a miller cmf80 with beckett motor, trailer furance in garage. Having issues getting it to run. I turn it on. Can see a blue flame inside. it runs for about 30 seconds then stops and reset button pops. Any suggestions? Thanks
  14. HVAC
    So I've been frustrated trying to figure out a furnace issue. The inducer blower turns on but the igniter won't glow. After a while of troubleshooting, I figured out the igniter is fine but there doesn't seem to be enough airflow from the blower to close the pressure switch. I thought maybe...
  15. HVAC
    Good evening, I have a York YP9C furnace. When I went to switch on the heat, nothing happened. Looking at the control board (FCB), i have 3 quick red blinking lights to indicate a pressure switch issue, however this is due to the inducer motor not turning on. I have diagnosed to board myself...
  16. HVAC
    Please help me diagnose my furnace problems. Over the last 5 years my furnace has gone dead about half a dozen times and resurrected after a few hours. It’s happened twice in the last week. The 2 diagnostic LEDs are dead. I measured the voltage at the 24V transformer. It’s generating 27V just...
  17. HVAC
    Hello! I have gone through a fair amount of options trying to solve this and it has not been fruitful. I was wondering if anyone on here might have experienced this before, or maybe has a recommendation on what I should try next? We got a house last year with a Carrier furnace. We are in...
  18. HVAC
    I just moved in to a new house and we realized that there is no heat. I am pretty sure the pilot light is not lit on the furnace considering I see no flames when I look through that little sight picture glass (pictures in my album). I have no experience lighting pilot lights, especially on...
  19. HVAC
    Hello all: New to this forum. I have a problem with my Lennox G61MPV furnace; hope someone here has some ideas. Furnace suddenly started to "flame off" 4 seconds after ignition. Everywhere I looked it said for this problem clean or replace the flame sensor. I bought a replacement and installed...
  20. HVAC
    I am trying to troubleshoot my York Furnace: MODEL: TGLS100C20MP11A ISSUE: The furnace intermittently does not start. After resetting the power by unplugging and plugging back in, the furnace will run a cycle, maybe two or more and then will fail to start some time after. When running, it...
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