On Dec 17, 6:39*am, Smitty Two wrote:
Sometime soon I'll be taking a 45 minute drive to look at a friend's DC
powered propane fridge. I've never even seen one of these. She says it
hasn't worked for months, but recently a solar power expert has been
working up there, repairing things. Now the fridge works, sort of. As
she describes it:

There is an ON/OFF slide switch which is now mysteriously backwards; the
ON indicator light comes on with the switch supposedly in the OFF
position. I'm thinking this is a SPST that just got pulled and
reinstalled backwards, but maybe not.

The burner will light, and cool the box to 34F, when she presses the
start button. However, once the fridge warms up, it won't re-ignite
automatically.

What tools should I take, and what should I be looking for?

It will have a flame failure device. The likliest culprit is the
thermocouple either not putting out the full voltage or not getting
heated enough. (ie not in the flame or flame is too small). Gas jet
could be semi-blocked, gas pressure too low.
Flame shield missing/displaced letting the flame be blown out.
Most tradtional gas equipment's problems revolve around the
thermocouple.

The thermocouple can unfortunately only be checked by substitution as
it's difficult to check the output under load. ie you have to buy one
& it might not be needed.