On arrival, checked in with IVR and store manager. Store manager brought me to the t-stat that was not operational. Tested for voltage at the t-stat, found none whatsoever. Gained roof access found a relay that had failed. Replaced relay and found power had been restored to t-stat. System was in a call for heat but burners were not igniting. Found ignition control module was not passing 24v to gas valve and determined that the ignition control module had had failed. Notified ENTOUCH of what I had found. ENTOUCH also confirmed that all t-stats were communicating and online. ENTOUCH gave a reference number to be checked on status of quote, 001205673393 Will have to quote out repairs, order parts and return at a later date to complete repairs. Notified store manager diagnosis. Obtained signature for work acknowledgment, work order and checked out with IVR. One of the thermostats is blank it is not even on and the back end of the production area is really cold FS: Thermostat AHU6 has no po