Thread: Heated driver seat really hot!!!

Fixed the broken heating element and now my driver heated seat gets really hot. Is it possible to plug in something wrong. Low or hi seem the same. Can only leave on for 5 minutes max.

Is the module bad?
Is this what happened to burn out the one element in the first place?

2002 SSEI Bonneville

It might have to do with how close the thermistor is to the heating element. I've found that leaving it too close to the element causes the thermistor to heat up too early and reduce heat to the seat... perhaps you have the opposite problem, with the thermistor too far away from the heating element and not sensing a hot seat, so it doesn't reduce voltage to correct for it.

Just a thought.

Originally Posted by GTP131

It might have to do with how close the thermistor is to the heating element. I've found that leaving it too close to the element causes the thermistor to heat up too early and reduce heat to the seat... perhaps you have the opposite problem, with the thermistor too far away from the heating element and not sensing a hot seat, so it doesn't reduce voltage to correct for it.

Just a thought.

Not sure where the thermistor is but it feels like full heat until I shut it off. I only repaired the one element and I didn't move anything else. I will have to find the thermistor.

Anyone no where it is on a bonneville?

its in the seat cushion

The heated seat system is designed in order to warm the seat cushion and seat back to approximately 107.6°F (42°C) when in the high position, and 98.6°F (37°C) when in the low position. The heated seat module monitors the seat temperature through the temperature sensor signal circuit and the temperature sensor (thermistor) that is located in the seat cushion. The temperature sensor is a variable resistor, it's resistance changes as the temperature of the seat changes. When the temperature sensor resistance indicates to the heated seat module that the seat has reached the desired temperature, the module opens the ground path of the seat heating elements through the heated seat element control circuit. The module will then cycle the element control circuit open and closed in order to maintain the desired temperature