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Seat heaters . . . do the elements go bad?? Sticky element connections . . . 700 1990

posted by  Herb Goltz on  Thu Nov 29 06:37 CST 2007
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last visit: Fri Oct 24 13:23 CST 2014
[RELATED]

The seat heater relays are thermostatically controlled, so if the temp is above some amount, they will shut off (I think the exact amount is in the 700/900FAQ, if memory serves it is somewhere around 10C). That said, resoldering the relays or swapping them with a good one is worth a shot-- I have had one fail because of cold solder joints.

I think there is also information in there about how to test continuity-- the circuits are more complicated than on the 240, where invariably it is the thermostat or it's connection that fails.

I also seem to recall that the switches are more complicated, and that the switch bulb is actually in the circuit for the heater, so if the bulb is out the switch won't work, but it has been a while since I looked at one and it might be wrong.

See this post by Dave Stevens, who has written more on the topic, if memory serves...

http://www.brickboard.com/RWD/index.htm?id=1007288

Good luck!

--
Herb Goltz, Aurora, Ontario, Canada '92 945t 210K mi






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