Mar 03, 2020 · Fujitsu Air Conditioner Troubleshooting. In the event of a malfunction (burning smell, etc.), immediately stop operation, disconnect the Power Supply Plug, and consult authorized service personnel. Merely turning off the unit’s power switch will not completely disconnect the unit from the power source.
Check the control board and control the power for problems. Details for Carrier Thermostat Troubleshooting Check the Wiring. 1 Check the wiring. A careful, methodical inspection of the wiring and connections. Something could have pinched the wire bundle or fell on it from inside the wall and damaged it.
Troubleshooting Your Thermostat Why is my thermostat’s display blank? Replace the batteries (see the next question if this doesn’t work) Flip the AC/furnace switch on your circuit breaker to “off” then back “on” Reset the thermostat – this can be done by flipping the switch from “off” to “heat” continuously
Smarthome is one of the world's largest home automation retailers, becoming an easy-to-use source for affordable devices - including smart lighting control, smart thermostats, smart home security, wireless cameras, doorbell cameras, door locks, and much more - all of which the average do-it-yourselfer can safely install. Oct 14, 2014 · If your HVAC system suddenly stops working, the first place to start troubleshooting is the thermostat. If you see a blank screen on the device, check the batteries before calling in an HVAC professional. Some devices show a warning light that alerts you about a month or two before the batteries will fail.