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When the furnace starts to warm up before a cycle it runs for a few then shuts off and then back off and does it a few more times then it just quits

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You Need To Replace your Thermostat!!!
Go To Home Depot, Sears Or Another Hardware Store And They May Have One Just like Yours.
The Problem Is The Heater Ignites So It Has Gas And Spark So The Igniter is Good But When The Thermostat Doesn't Detect The Flame The Heater Will Then Attempt To Relight And Or Shut Off.

Your Thermostat Maybe Just Needs To Be Adjusted But Most Likely It Needs Replacement.
I'm %100 On This One.

Posted on Jan 20, 2009

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My furnace runs to operating temp on thermostat shuts down then within 30 seconds try's to cycle back on three to four times. What would cause this.


Some thermostats have a swing setting that can be adjusted. A swing is the setting when you want the furnace to stop or start from the desired set point. For example, you set your thermostat at 70 and the swing is set at 10 degrees. Then the furnace will turn on 5 degrees below 70 and shut off 5 degrees above 70. Check you thermostats manual if it has this option.

Mar 15, 2016 | Air Conditioners

1 Answer

Furnace was turning on for a few seconds then shutting off. I turned it completely off for ten minutes and then back on. Now it is running normally. Is it fixed or do I still need a repair?


Maybe the reboot did the trick - with lots of the electronics now on common appliances and gadgets, a reboot, as in computers, often does the trick. Continue to monitor so that if the issue re occurs you have it addressed under warranty.

Nov 23, 2015 | Amana Air Conditioners

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Furnace won't stay lit. Intertherm Model M2RC-080A-16BN. Ignightor glows, flame starts and after a few seconds the flame shuts off. Then it starts the cycle again. It goes thru this cycle a fe


It sounds like the flame sensor is bad. If thats not the case you may need to replace the control board. You should make sure the flame sensor is directly into the flame.

Nov 20, 2014 | Intertherm Air Conditioners

1 Answer

Have a Fridgidaire GR6C-080C-16 furnace that runs for a few minutes then gas supply is cut-off. Furnace will then re-start and the run through it's pre-cycle, just as if the thermostat just called for...


It sounds to me like you have problems with the gas valve as you have eliminated pretty much everything else. I would check all wiring to valve,check for any breaks on the insulation and clean all connections.
When the burner goes out is the blower still running or does it quit then the burner go off? If that is the case I would think the thermal overload on motor was tripping. It makes me more inclined to suspect the gas valve due to the lack of any diagnostic code.
One other thing I would try is to check power to gas valve when burner is firing and see what it does when it cuts out.If it maintains power when gas shuts off then I would replace gas valve. Good luck and thank you.

Feb 14, 2011 | Air Conditioners

1 Answer

Furnance kicks on but will only heat to about 13- 14 degrees then kicks off.... this happened last year and it was the flame sensor so it could be that again if so where is the flame sensor located? or...


usually if the flame sensor is dirty, the burners will light and then go out after about 3-4 seconds. it sounds like your furnace is staying lit for quit awhile and i would not suspect a flame sensor. I would look more at an air flow issue. if the furnace it running long enough to warm the house up 13-14 degrees. i would check the air filter to see if it may be dirty or even if you have a large enough opening for the filter to allow good air flow. you could have a situation were you are either not getting enough air to the furnace, or not being able to get rid of the heat being generated and causing the furnace to shut off on high limit. normally if a furnace shuts off on high limit, the fan will continue to run until it cools down and then it will fire back up. this may continue a few times. sometimes if a furnace trips on high limit too many times, it will lock out for a few hours before trying to light again. I would make sure you have plenty of air getting to the furnace and make sure all the supplies are open and not blocked. is this a problem that just started. did you just purchase the house and it has always worked this way. any information regarding the history of the unit would help narrow down the problem. also if the unit has a/c on it, it may have a dirty coil that is restricting air flow.

Nov 19, 2010 | Air Conditioners

1 Answer

Furnace is blowing but gas is going off and on all the time


Check the heat anticipator on the stat if its a manual one

Mar 16, 2009 | Air Conditioners

1 Answer

Furnace starting


Hint number 1, get HVAC license. One mistake or misunderstanding and you could blow your house up.

Feb 21, 2009 | Air Conditioners

1 Answer

Carrier XHD183D Through-the-Wall Heater/AC runs constantly


YOU COULD EITHER HAVE A THERMOSTAT PROBLEM OR FAN CONTROL PROBLEM.TURN THE POWER OFF AT THE FURNACE AND TAKE THE THERMOSTAT OFF THE WALL.MAKE SURE YOU MARK THE WIRES SO YOU KNOW HOW TO HOOK IT BACK UP AGAIN.RESTORE POWER TO THE FURNACE.TOUCH THE WIRES THAT WERE HOOKED TO THE R & G TERMINALS ON THE T-STAT TOGETHER AND HOLD THEM THERE.OBSERVE THE OPERATION. WHEN YOU TAKE THEM APART DOES THE BLOWER STOP?TRY IT A FEW TIMES. IF IT CONTINUES TO START AND STOP YOU GOT A BAD T-STAT.JEFF

Dec 13, 2007 | Carrier XHD183D Air Conditioner

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