Question about Heating & Cooling
Burner gets nice and hot, but shuts down before circulation fan comes on. Burner status lights flash.
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Posted on Jan 02, 2017
Not sure exactly what is meant by half way it shuts off. My furnance wouldn't heat to 68 degrees from a setting of 63 degrees on the setback thermostat without shutting down several times with a single flashing led. It would reset after an hour or so until it finally reached the 68 degrees. The problem turned out to be the tube that drains the water from the blower assembly. It had a belly in the middle which would cause the water to sit and block the airflow sensor for the gas value. Lifted tube to allow proper drainage to correct.
Posted on Dec 24, 2008
All gas furnaces have a fan control of some sort. Either a mechanical fan control where there is a temperature probe that reaches into the heat exchanger compartment thru a hole in the panel that separates the control part of the furnace(this would be the front of the furnace where all the controls are) from the heat exchanger. This type of control is either a small black plastic control about 4 inches by 2 inches and about 1 1/2 inches thick secured to the panel with 2 screws. Or it is a slightly larger silver colored control that should have a pull off cover. It may say Honeywell on it. Either way the control will need replacing.
The other type of fan control is a solid state control board. This will most likely be located in the indoor fan compartment. It should be located under a covered control box. The box with all the wires going into it. This board will also need to be replaced if your furnace uses this type of fan control. You will need to bring your furnace model and serial number to a dealer that sells your brand of furnace or go online to a parts dealer that carries parts for your furnace. Hope I was of help to you! Good luck!
Posted on Nov 28, 2009
SOURCE: main burner comes on and
There could be a couple of different things happening...
The most likely is that the high limit switch is bad and the flame causes it to bring on the blower and then shuts the flame down also...this could be because the high limit is bad or because the vent is blocked and the flue gases are not venting...
Could also be a bad/dirty flame sensor, but that is not as likely...
I would checkout the high limit and find out what is going on there...
Posted on Feb 02, 2011
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