I spoke with my contact at dometic who took on the atwood water heaters and they said that the dsi fault light on the switch for your atwood rv water heater at94022 gc10a 4e will only come on for two reasons.
Atwood water heater switch light.
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My atwood gas only water heater won t light red light is on but no sparking from ignighter.
Michael hi the sequence of operation is that the switch when turned on turns the light on and sends power to the water heater the light should go off when off the water heater is working if it comes back on the water.
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Date first available november 13 2013.
Rv water heater thermal cut off switch kit replace for atwood 93866 work for the electronic water heater models gch6 4e gch6 6e g6a 7e g6a 8e gc6aa 9e gch10a 2e g610 3e gh610 3e xt series.
If the switch does not light up this typically means it is connected incorrectly or the fuse circuit breaker for the water heater circuit has blown is tripped.
The first reason is that the water heater has attempted to ignite and failed while the second reason is that the eco has become an open circuit.