11-13-25 They have two systems and not working properly I spoke to Adam upon arrival, decided to do the gym and front lobby since the temperature in those two rooms was down to 57° Carrier RTU M0del# 48TCTD20BCA6A0H1A0 Serial # 0916P28172 Was calling for heat, induced motor was running found the flame sensor was dirty getting a reading of 1.7 micro amps. Pull the burner above the sensor clean the sensor currently getting 5.6 micro amps. Ran and cycled the unit in heat mode. System is working at this time. Aaon unit 100% make up air Serial# 201602-ANGH51131 This system feeds the kitchen and the laundry room area Thermostat TS ll Unit is not working in the heat mode. I do have a call for heat at the controller (VCB-X Controller my relay 2 light is not energizing. When I put the unit into forced on the system does work. Than foind that the ignition module first stage is tripping off because of a limit switch. I tested all three limit switches separately and they were OK however, ther