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Carrier furnance keeps running

Furnance wont shut off

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  • Stephen Evans May 11, 2010

    The heat or the fan

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  • 4 Answers

Check for open limit switch, their are multiple, check return air filter.

Posted on Apr 07, 2009

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How to make sure you Heat is working


A common problem with a furnance is the furnance will attempt to ignite, several times, you will notice that the house is not heating properly. You will hear the furnance come on and you will assume the heat is on, and the house will continue to be cool. You wiil check the furnance and you will hear it start up and the blower will come on, however a few seconds later after you have walked away the blower will shut down and there is no heat on at this time. You will again go check the furnance and after the furnance start and go through the cycle the furnance will shut down you will notice that the furnance has indeed shut down. This is the common problem of the flame sensor, you will have to remove the flame sensor, get a small piece of fine grade sand paper, and remove all the black colored carbon from the flame sensor until is is shinning bright, replace the flame sensor and attempt to start the furnance. You will notice that apatment or house have reach the set temperture, that the furnance has went through its cycle and the furnance will ignite and stay on continueously until the house obtain the preset temperture..

on Dec 13, 2009 | Heating & Cooling

1 Answer

Hi,my name is julio i have a problem with my goodman furnance,the furnance run for 10 or 15 minutes and then shut off and come back again for 5 minutes keep do in on and off on and off and then shu off...


it is probably hitting the high limit switch possibly.
Is your filter clean?
Are all the vents in the house full open?
Is your furnace vent (flue Pipes) clean and unobstructed?

Jan 07, 2011 | Goodman GMS90703BXA Heater

1 Answer

I have a Carrier furnance that is about 20 years old. I don't know the model or do I have a manual. The thermostat is a programmable Noma (model THM301M). When I set the the thermostat to hold a...


I would start by installing a new thermostat because it sounds to me like it's either the thermostat or the control board and the t-stat is the less expensive of the two. I hope this helps you and thanks.

Jan 05, 2011 | Heating & Cooling

1 Answer

To what terminals do the two wires coming from the a/c unit connect to on the furnance?i have r w g y c on the furnance board. its a carrier tech 2000 a/c and a rheem criterion 2 furnance


The 2 wires that come from the outside unit will connect to the Y(Cooling) and the C(Common) terminals on the board. It doesn't matter which wire goes to either one, they both work either way. Have a good one!

Sep 01, 2010 | Heating & Cooling

1 Answer

Carrier 38CKC048 unit outside does not turned off when the furnance fan is turned off by the thermostat, I believe its the contact switch that is sticking what part do I need to replace, and can I do it or...


do you own a multi meter? do you know how to use one? if not call some one.
does the unit keep running outside if you turn off the furnace power switch. if it keeps running it the contactor in the condensing unit. if it shuts off it is your t-stat.

May 28, 2010 | Carrier 38CKC048 Air Conditioner

1 Answer

Heater keeps turning on & off but no heat


What type of heater are we talking about? if its the home furnance, it sounds like the ignitor is coming on and shutting back down, the heat comes on ignite and the blower comes on like normal, then after a few minutes it will shut down, you will have to remove the ignitor, clean it with a little piece of sand paper to remove the carbon build-up, replace the ignitor and turn the furnance back on, this should correct the problem.

Dec 14, 2009 | Heating & Cooling

1 Answer

Water keeps running into humidifier even furnance blower is not


This sounds like, the 550 transformer is not connected to the blower motor power connection (in parallel)

Feb 19, 2009 | Aprilaire 550 Humidifier

2 Answers

Gas furnance won't stay lit.


have a furnace man take a look it sounds like the itermitter control

Feb 05, 2009 | Goodman GMS80904BNA Open Flame Mid-Size...

1 Answer

Burners wont ignite


does unit have thermo-cupling

Nov 23, 2008 | Carrier 52PQ307 Wall/Window Air...

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