I just had my espar heater fully serviced last night in my peterbilt 389. However it still isn't working. The controller is running the time down as if the heater is working but it's not. Any ideas why this could be?? Also not sure if it's related but when I try and go into diagnostic mode to clear anything on there it say diagnostics unavailable check blue and white wires?? Any help would be appreciated as it's starting to get cold in the great white north.
Thanks
Thanks
