Backrest won't heat

[TinyTot2]

The driver's side backrest will not heat on its own (if I hit the top switch). The switch will light up for 10 seconds, then I hear a click, and the lights go out 5 seconds after.

It does seem to heat if I use the switch for both the seat and the backrest.

What could cause this? A bad switch?

This is for my '07 Tahoe.

 

[TinyTot2]

Well, the backrest heats perfectly when my husband sits in it, so there must be a pressure switch that I'm too light trigger.

Nice that Tahoe isn't broken, but sucks because I'd use that feature often.

 

[Rockytfox]

I'm not certain, but I don't believe it's a pressure switch. Sounds like something else is going on. Are there two bottoms for the same seat? (ie one for the seat and another for the lumbar?)

 

[TinyTot2]

Yes, there are two buttons. The top does lumbar only, the bottom is for both the seat and the lumbar.

We tested it again today... I really got myself snug into the seat to get some more pressure on it and the heat finally stayed on. Then I let off the backrest a bit and the heat went off.

Maybe it's a safety feature?

 

[Smokymance]

i think they turn off after they reach a certain temp...so if its being used on a hot day, might mess with how long it stays on