Gas furnace not heating; making clicking noise


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Old 04-11-16, 06:48 PM
J
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Gas furnace not heating; making clicking noise

The clicking noise started several days ago and now there is no heat. The furnace has a Honeywell VR8204H original valve. I was able to see a flame on repeated heat calls but the flame goes out in a couple of seconds. The burners are not coming on. This unit has a porcelain covered igniter. Could it be a failed gas valve? I should have paid attention to the flash pattern of the LED light on the control board before I took apart the heating assembly...

Any suggestions would be greatly appreciated.

John[SUB][/SUB]
 
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Old 04-11-16, 07:31 PM
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Welcome to the forums.

An actual make and model of the furnace would be real handy here.

Based on that valve model it's an intermittent ignition system. That means a spark ignites the pilot and then the pilot ignites the burner.

On a call for heat.... there may or may not be a draft inducer starting.... then spark starts and the pilot valve opens. When the pilot is sensed the spark stops and the main burner can light.

A typical problem is the pilot flame is not large enough to be sensed and the re-light process starts over. It may be something as simple as a dirty pilot orifice.
 
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Old 04-12-16, 01:30 PM
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Take the cover off the burner compartment of the furnace.

Find the furnace rating plate in the burner compartment and post the make and model of the furnace listed there.

Carefully observe the SEQUENCE of events which occur when you turn up the thermostat for heat. Post that sequence here, in order and in detail.
 
 

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