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I have an older Carrier Gas Furnace. I can't read the complete Model number. But since Thursday morning, the blower just keeps blowing cold air, the spark igniter won't spark and the air damper will not open. I replaced the spark igniter and the pilot assembly for $215 and the thing still just won't light. As soon as you turn on the power the blower comes on and just runs. I check my 24v supplies from the transformer, and I am getting voltage. What else could it be. There are no LED's on the PCB.

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Nothing will happen until the draft motor come on or the vent damper opens.  if that's happening, are you getting gas?

Posted on Dec 02, 2008

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this model number you gave is for an electric furnace , most often its found in mobile homes , if its undersized for the load of the home a larger unit is needed , if I look at this one right here , it says this one will provide 3.6 tons of heat this size will only heat a small area (about 15x25x7 feet ) and wall insulation will help increase this too , also the wall thermostat will " cycle" the heater on an off due to demand , if its placed in a drafty spot then that will affect proformance as well

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Furnace is blowing cold air.


You must have an electric furnace, gas furnaces only come on when the heater is warm. Electric heaters come on with the use of a sequencer. Your sequencer, tstat, and blower is fine, which means you must have broken heating element. I have a nice pictoral of how to restring one HERE

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1 Answer

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Could be a defective thermostat in the plenum.
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1 Answer

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1 Answer

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