We have a 1999 Fleetwood Discovery model 37V. The front heater comes on with the Intellitec Electronic Climate Control switch in the off position. The service shop has replaced the relay a couple of times. The ECC is no longer available so my service shop sent the ECC and relay to Intellitec and they worked on the switch. After reinstalling the ECC and relay the front heater still came on with the switch in the off position. The ECC has switching for the front heater and ac and one for the rear heater and ac. We are really at a lose on what to do next. I contacted Fleetwood and they were no help other than to tell me the would send an electrical diagram. Has anyone experienced this problem?