When i ve reached out to my contact at dometic in the past he has said that your atwood water heater like part at96121 either has a bad control board or bad electrode.
Atwood water heater no spark.
Print that out so you have it.
Retmotor if you can access the back side of your water heater check to see if the ground wires are attached securely.
If you can pick one up this morning we can track this down quickly and find out where the problem is.
2017 answered by a verified rv mechanic.
Our water heater quit working so i took it upon myself to get it working again.
That is the correct ignitor for older 2 wire water heaters.
If you have an older model atwood water heater with 2 wires try searching for number 91606.
This can happen if you have a weak gas control magnet or if the thermocouple needs to be replaced.
Or it might be in the thermostat or eco.
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Troubleshooting atwood water heater producing spark but not lighting.
It might be the thermal fuse that brings power to the board or the fuse on the board or the board itself.
This ignitor is for the newer model atwood water heaters only with only one wire.
Ignition is not clicking.
One of the most common problems with atwood rv water heater is a pilot outage.
If it is not too old hen you can try cleaning the orifice and see how it goes.
I am attaching a link to the atwood water heater manual for you.