# Seat heater

**URL:** <https://community.cartalk.com/t/seat-heater/83116>\
**Category:** Maintenance/Repairs\
**Tags:** saturn\
**Created:** [January 12, 2014, 7:48am UTC](https://community.cartalk.com/t/seat-heater/83116 "2014-01-12T07:48:48Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![henryray](https://avatars.discourse-cdn.com/v4/letter/h/5fc32e/32.png) [@henryray](https://community.cartalk.com/u/henryray)\
**Post date:** [January 12, 2014, 7:48am UTC](https://community.cartalk.com/t/seat-heater/83116/1 "2014-01-12T07:48:48Z")

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I have a 2007 Saturn Relay with heated seats. One of the seat heaters has quit working and now the other one gets super hot after it is turned on for a while. What is causing the seat to get super hot? I don’t want to burn up anything.

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**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\
**Post date:** [January 12, 2014, 7:52am UTC](https://community.cartalk.com/t/seat-heater/83116/2 "2014-01-12T07:52:42Z")

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Sounds like the controls themselves are bad, perhaps the thermostat portion. I don’t know if these are controlled by a Body Control Module (BCM) as so many other things are these days, but perhaps someone on a Saturn forum would have some insight.

Sorry, I wish I could be more help, but I’m unfamiliar with the heated seat systems on Saturns.

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**Author:** ![missileman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/missileman/32/1366_2.png) [@missileman](https://community.cartalk.com/u/missileman)\
**Post date:** [January 12, 2014, 8:09pm UTC](https://community.cartalk.com/t/seat-heater/83116/3 "2014-01-12T20:09:11Z")

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I agree with @samemountainbike here. The only experience I’ve had with heated seats is with the ones in my daughter-in-law’s truck. She had me disconnect the one that was working because it got too hot. I have a theory that both seats must work off the same circuit and when one fails the other gets more current somehow.

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**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\
**Post date:** [January 12, 2014, 9:16pm UTC](https://community.cartalk.com/t/seat-heater/83116/4 "2014-01-12T21:16:13Z")

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I thought of that too, miissileman, but having them in series rather than parallel would seem too “3rd grade” to believe the designers would do that, and I can’t think of a way they could be in parallel and the failure of one would allow more current through the second. But, then, I don’t have the circuit schematic in front of me! If I did, I’d probably say “oh yeah, no wonder…”.

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**Author:** ![knfenimore](https://avatars.discourse-cdn.com/v4/letter/k/9fc348/32.png) [@knfenimore](https://community.cartalk.com/u/knfenimore)\
**Post date:** [January 12, 2014, 10:01pm UTC](https://community.cartalk.com/t/seat-heater/83116/5 "2014-01-12T22:01:09Z")

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There are fuses and relays that could be causing the problem The BCM is supposed to control the temp using the sensor in the seat. The HVAC control sets demand.