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Category: HVAC
Satisfied Customers: 14207
Experience:  15yrs in the HVAC industry with certificates and degrees.
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Pulse 21 ignition control
, light is on on the control

Customer Question

Customer: ***** ***** Pulse 21 ignition control
JA: Thanks. Can you give me any more details about your issue?
Customer: Green light is on on the control but it wont start, fan runs if i jump it
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Submitted: 1 year ago.
Category: HVAC
Expert:  airheatman replied 1 year ago.

Can you give me the complete model number on the furnace? It will be on a label on inside furnace panel just above burners.Remove panel to burner compartment and look inside. The model number will help me give accurate assistance for your specific unit.

Below is a link showing where to find label with model number:

If furnace is not coming on, there should be an error light flashing on the control board in blower compartment to indicate what has failed. If you can locate this and tell me the pattern of the flash, that will point us in the right direction for troubleshooting.

Also let me know if you have a multi meter for troubleshooting.WE will go from here.

Customer: replied 1 year ago.
Model Number G21Q3-60-1 No flashing light It just tries to start again
Expert:  airheatman replied 1 year ago.

Ok this is an older furnace before they put error lights on board. Does the vent purge motor start on call for heat?

Customer: replied 1 year ago.
i think so it hums
Expert:  airheatman replied 1 year ago.

Is red led lit?

Customer: replied 1 year ago.
No red light just a green light
Customer: replied 1 year ago.
the green light stays on runs for 8 sec shuts off and starts again
Expert:  airheatman replied 1 year ago.

I am going to open to other experts.My manual is showing we should have red diagnostic light on if it fails.

Customer: replied 1 year ago.
now its running
Expert:  HVAC Guru replied 1 year ago.

OK is it all working good?

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