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BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22541
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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I have an intertherm gas furnace, the led is flashing four

Resolved Question:

I have an intertherm gas furnace, the led is flashing four times, it means lockout due to failed ignition. What would cause this and how can i fix it?
Submitted: 7 years ago.
Category: HVAC
Expert:  BillyHvac replied 7 years ago.


this depends one one item in particular, does the flame come on and go out a few seconds late?...or never come on?

Customer: replied 7 years ago.
it never comes on
Expert:  BillyHvac replied 7 years ago.



the exhaust motor starts

runs for maybe 45 seconds

something clicks and the shuts down a minute later?

Customer: replied 7 years ago.
not sure what you mean by exhaust motor ? somthing comes on then it clicks a few time like an ignitor on a grill but nothing lights up. It does this for a cycle of about four times then shuts down I know its getting gas cause i can smell it
Expert:  BillyHvac replied 7 years ago.


It appears the ignitor is broken.


Refer to this manual on page 27.


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