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limit switch

  1. Goodman Furnace Diagnostic Code Question

    HVAC
    I am new here. I hope someone can give me some suggestions. I have a Goodman GMVC950905DXAC. 90,000 btu high efficiency propane furnace. I think it is about 7 or 8 years old. The problem is its blowing cold air. The diagnostic code is E3 which the reference says refers to the high limit...
  2. Goodman furnace issues - limit switch or something else?

    HVAC
    I have an issue with my furnace (Goodman GDT090-4B). Very early this morning I could hear it short cycling. I immediately thought gas valve, because the blower was running, the ignitor would glow, and after the click, I would not hear gas coming on. So furnace would not light, and the process...
  3. Carrier 58MVP080 - how can I disable second stage completely?

    HVAC
    I would like to disable second-stage heat completely on my Carrier furnace. How can I do that? Why? => My Carrier furnace often goes into "limit switch fault" and then "limit switch lockout" (more info below). I'm pretty sure this only happens when switching into the second stage and I want...
  4. Need help diagnosing a carrier code 33 limit switch issue

    HVAC
    Hello, I have a carrier furnance 58sta070 and it is throwing error code 13 then throwing error code 33 after being on for three minutes. At that time it turns off the burners and just runs the blower. The manual says this is the limit switch, so I bought an replaced that. Others online said it...
  5. Payne gas furnace limit switch cycling

    Appliances
    Greetings... I have a Payne Model 395BAW036095 that is operating normally when the house is up to temperature and the heater is only working to maintain that temperature. However, when the house is cold and the furnace is called upon to bring the temperature up from say 56 degrees to 68 or 70...
  6. HVAC inside fan wont turn off

    General DIY Discussions
    Hello all, We just bought our house about a month ago and our HVAC system was working fine, then 2 days ago we noticed that the inside fan wouldn't shut off. We had our thermostat set to AUTO but even when we switched to off it stayed on. I am not an electrician but I am pretty decent at...
  7. 10 yr old Bryant Furnace

    HVAC
    I have a problem with the Blower continuing to run to long after the burner cycles off. I have heard of limit switches that were not to costly to replace, but would like to know if this is the most likely problem, and where to locate them. This is an approx. 10 year old Bryant 93+ Forced Air...
  8. Lennox Furnace - Primary or Secondary Limit Switch Open

    HVAC
    My furnace stopped working today. It will turn on for a few seconds and then back off again, occasionally turning on for closer to a minute. The lights indicate that a limit switch is open. I've read enough where I think I can figure out if the limit switch is the problem by taking out the...
  9. Carrier Furnace Burners Cycling On/Off

    HVAC
    Furnace: Carrier 58GP150-LA Upflow (about twenty years old with match lit pilot) Last week I turned on the furnace and experienced the following problem. Thermostat calls for heat, burners fire up, blower turns on approximately 90 seconds later. After a few minutes of operation, the burners...
  10. Goodman Gas furnace will not light

    HVAC
    My furnace is early 90's with old style pilot. I noticed a couple weeks ago my furnace was acting strange. When the cycle would start the flames would light and run for about 2 minutes go out and then the blower would turn on and after about 15 seconds(a click) then flames would re-ignite and...
  11. York Furnance Blower Will Not Shut Off

    HVAC
    I have a York Electric Furnance and the Blower will not shut off. The Model No. is 2HW06502006A the heating coils will heat and it blows warm air until it reaches the desired temp but the blower continues to run until the thermostat is manually shut off. Wondering how to determine what the...
  12. Furnace limit switch

    HVAC
    I had my furnace limit switch go out a year ago and had a service tech replace it. Last week the same thing happened, i am told it was because I had a dirty filter(which I probably did, I am doing some drywalling, sanding etc in my house, lots of white dust). I replaced the limit switch again...
  13. Replace secondary limit switches on Lennox 80MGF?

    HVAC
    A bit of a story to set up my simple question... My Lennox 80MGF furnace was failing to ignite. After troubleshooting with the help of the web, I figured out that it was providing a "Limit Switch Open" error code. I used a multimeter and determined the primary limit switch was closed (no...
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