Arrived and found the temperature in the house at 86 degrees with the system still running. Thermostats were set to 67 degrees and not calling for heat. Found on the EWC board the W1 red light on all the dampers open. Once I took the R wire off the control board in the furnace the power turned off at the EWC and the system shut down. Reset the system and it did not happen again. Tested the wires going to the equipment for short which I did not find any. Spoke with another technician to see if they have had this issue with the EWC boards. This is the first hes scene a relay get stuck and constantly call for heat. Need to replace the EWC board which was not replaced during the install of the system. Replaced and tested the system.