Try to find the circuit breaker or the fuse box and find the circuit breaker or fuse that controls the AC and flip it off, until you are able to get this repaired.
Most often, when this happens, it is a short circuit that has damaged the controls of the A/C or the thermostat. ( Such as a lightning hit) God bless our efforts.
SOURCE: MY HEAT PUMP SYSTEM WILL NOT WORK IN EMERGENCY MODE
the thermostat sub base has a place to connect a wire usually white to energize the heat strips when you push the stat way hotter than the house temp. that is why the strips come on in normal heat. it also has a terminal that is only energized in emergency heat and it also should have a wire connected to it so that terminal can supply power to the strips when the stat is switched into emerg heat . you can identify the terminal from the wiring diagram and if need be jumper w2 wire over to the aux terminal and it will work. they both go back into the airhandler and power the same strips. w2..................................................................................................w2 in airhandler to strips or w2...jumper to aux......................................................................................................................w2 in airhandler to strips.
SOURCE: HVAC problem
One thing you can check is the condensation line to see if there are wires going to it. This is the plastic pipe coming out of the indoor unit. If there is a float switch and the condesate line is clogged then it will not allow the a/c to operate. If the line is clogged you can use a WET/DRY vacuum on the end of the pipe which should be next to the outdoor unit. Hope this solves the problem. Good luck. Keep me posted please.
SOURCE: Dometic AC that the fan shuts off but the compressor keeps running
call dometic dealer. I hear they have a bad circuit board that is replaced.
SOURCE: Thermostat will not turn on AC unit or the fan in
Here is what I would try to see if the thermostat is bad. Take the facing off the thermostat. Once this is done you will see where the wiring is connected should be a red green yellow and white Turn off power to unit make a diagram as to where the wiring was connected red to r green to g and so on Remove these wires red green and yellow and twist them together Go to the power source and re energize the unit once this is done all components should come on if not the thermostat isn't your problem Red is your low voltage power supply (24 volts) Green is your fan motor in furnance, yellow is your outside cooling unit. 1 other thing you might check. In the furnance if the doors are not properly installed on the face of the furnance it may not allow the unit to come on. There is a safety switch on the furnance where the filter is that if the door is not put on properly the whole system loses power and will not work. Hope this helps. Good Luck
Dave
SOURCE: I only have two settings. Which is which and how so?
I think you probably have a heat pump. Aux heat is electrical resistance heat coils that produce heat when the heat pump can not produce enough to keep the temperature up (caused by low outside temperature or a problem with the refrigerant system). This resistance heat can be switched on by the emerg. heat button. It also can come on automaticlly (sp) and will be indicated by the aux being shown on the thermostat. Sometime if you set the heat up several degrees by thermostat the aux will come on to help the system catch up to the desired temperature setting. The emerg. heat is a way to turn on the AUX manually. If you do not have a heat pump system then it is possible that you have a heat pump thermostat installed on a non heat pump system. Emergency heat and Aux are both the secondary.
Hope this makes sense1
Bob
Testimonial: "So in other words, either my thermostat is mismatched or I actually have THREE heat settings. Thanks a lot Bob. Your input made all the difference."
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