The seat heater on the passenger side of our 2009 equinox, doesn't always work, along with the drivers side under certain events. If there is only the driver in the front seat the drivers seat heater works as it is designed. If there is a front passenger, the drivers and passengers heater may work for a short period of time or they will only stay on briefly. If the driver takes the weight off his seat and the passenger turns on the heater, then after the weight returns to the drivers seat the passenger heater will continue to work, but usually not for an extended period of time. What are your thoughts?