This is a proxey question for my neighbor. They have a Jayco Kiwi that the heater will come on sometimes and not others. It sounds like a bad thermal couple to me. I am not sure where to look to se...
Thermocouples are $8. I would just throw one in it. It can't hurt. The only way to check them is to use a voltmeter and apply heat and measure the differnce in voltage from hot to cold.
Or like I said, they are $8. :)
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