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Category: HVAC
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Experience:  Experienced in all aspects of HVAC, both residential and commercial.
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Goodman Amana furnace will not run. Draft inducer runs ,switch

Customer Question

Goodman Amana furnace will not run. Draft inducer runs ,switch makes all safety's are on (continuity across all rollout switches) Ignitor runs for about 5 seconds , there is no 24 volts to Gas valve and than all shut down. LED on main board does not give a blinking code.
Submitted: 2 years ago.
Category: HVAC
Expert:  M Oglesby replied 2 years ago.

M Oglesby :

Remove the rubber hose from the draft inducer motor.

M Oglesby :

Blow through it to make sure it is clear. Also inspect the hose for any breaks or tares.

M Oglesby :

Then use a paper clip to clean out the connection on the inducer fan motor very good. The paper clip should go all the way through.

Customer :

Done already.

M Oglesby :

Apply force if necessary.

M Oglesby :

Did you use a paper clip to clean the connection on the inducer fan motor?

Customer :

Need a minute to do it ...

M Oglesby :

ok

Customer :

ok done

M Oglesby :

Attempt to turn the heat on and tell me if the igniter glows red.

Customer :

ok

M Oglesby :

k

Customer :

same problem system runs for about 5 seconds , ignitor glows and than shut down.

Customer :

no gas no flame

Customer :

no0 24 v to gas valve

Customer :

Furnace will not run.

Customer :

hello...

Customer :

Hello.........

Expert:  Tim H. replied 2 years ago.
Thanks for giving me the opportunity to help! If you have 24 volts across C to W at the low voltage circuit board and it is going through this cycle of inducer running, ignitor glowing, but no voltage to gas valve, you have a bad circuit board and need to replace. Before you do this, however, make sure the 24 volts is constant across C (common) to W (heat).

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