Question about Heating & Cooling
Try cleaning the flame sencor or its the presure switch which is faulty
Posted on Feb 11, 2012
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Posted on Jan 02, 2017
Not having a model number to help you with, I can only give you generic info. Typically a flashing 1 represents that the furnace has exceeded its allowed attempts to start. Not much help. If I can suggest removing the access panel on the furnace and tape down the door safety switch. That being done, have a helper turn up the thermostat and you get your head inside the furnace cabinet and document what it does. It should first blink on the LED indicating a call for heat. Next the inducer blower should start up (the small blower hooked to the exhaust pipe). Next you may see an orange glow where the burner is. There should be a small clear port where you can watch this. Next some clicking should be heard from the gas valve. Then the orange glow should turn to a blue flame. This flame should travel all the way right and left igniting all the burners. Then it should stay on until the call for heat is satisfied.
After doing this and with your model number, get back to us and we may be able to pin-point your issue.
Posted on Dec 24, 2007
If you are getting ignition but it does not stay on long, check for a bad ground off of the circuit board to the chassis cabinet. Look at the flame sensor and the connection on the circuit board. Is the plug making contact to the board or is there a bent tab? Is the flame spreading from one side of the burners to the others very quickly or slow? If quickly, it has to be either the sensor or the control board. If slowly, clean the burners and the flame spreader.
Posted on Jan 02, 2009
One of two problems are happening here, your flame sensor is bad, your thermo pile or thermo couple is bad, or last is that the cap on the flue is blocking the exhaust from escaping
Posted on Feb 09, 2009
Keep in mind all furnaces and circuit boards are not the same. Look on the back of the door to the blower compartment. You should find the list of diagnostic codes. Look up four blinks it should narrow down the problem. Although from the discription you gave it sounds lie the high limit control. When a high limit appears to be acting up it DOES NOT mean that the high limit needs replaced. The high limit just may be doing its job. This means that the furnace is overheating. Check your filters. Are all of your registers open? Is your blower set on the right speed? Is your blower going bad? Is the blower motor capacitor bad? Is your evaporator coil restricted? Just changing a high limit switch does not always solve the original problem!
Posted on Apr 03, 2009
Inspect both the intake and exhaust pipes for blockage or debris. Inspect the small tubes that go from your combustion fan to the pressure switch and the tube that goes from the fan to the condensate drain. They all should be clean and dry. Inspect the combustion fan to see if it spins without it scraping on the housing or it may be filled with water or debris. Last, check the air filter and clean or replace.
Posted on Oct 11, 2009
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