Max etherm 333 igniter not getting 120volts

Jcrews5508

Member
Mar 6, 2021
9
Metairie, LA
Is there anything I should replace other than the Fenwel box? Heater won’t fire and I have replaced all Sensors and the igniter. Doing some basic electrical and found the igniter is not getting voltage. I have had some wiring damage over the years but the splices appear to be ok and the heater fires, gas comes on but I get nothing more than the dreaded click with nothing firing.

No lights on control panel other than service heater and the fenwall blinks 3 times which is time out.

Any recommendations? I have a new fenwell on order just making sure it couldn’t be something simpler.
 
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Where are you measuring the igniter voltage ?

S1 should have 120V in

S2 should have 120v to the igniter on start.

Dies the igniter measure 50 ohms?