Hi Now have 2 spare compressors that work on a independtant power but soon as you plug them into the system no go. As i understand the system several things stop the compressor. Door open,foot on brake,enough preasure,speed sensor and last heat sensor. We pluged in a new compressor and all is working fine. so i guess that points us to the heat sensor in the compressor.Can you help ? has any one striped one down do we know how it works what it looks like is it an easy part to purchase. I will have a go at pulling one down this weekend to see what makes it tick any hints would be helpfull and keep you posted. Thanks Ron