Heating Ventilating and Air Conditioning
Why would an air conditioner continue to run when the thermostat is completely off?
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Could an air conditioner be grounded if off at thermostat?
When dealing with HVAC systems, notice that there are two systems at work, and two possibilities for failure: the HVAC control system, and the actual HVAC unit. Determine if your problem is in the function of the controller (blank screen, not turning on, relay does not click on when fan or thermostat is set past current temperature), or in the HVAC unit (thermostat relay is clicking but HVAC fan does not turn on, condenser outside fan is not spinning, etc.) If the air conditioner was 'grounded', as I understand it, I would think your HVAC breaker would trip. This should help you figure out your problem.
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Why does LCD display on the thermostat AC in the house periodically shuts off happens more during the summer then after a few hours it turns back on and the AC kicks in?
Generally speaking, a thermostat should command an air conditioner (or a furnace) to turn off once the thermometer inside the thermostat senses that the a given temperature has been reached. For example, if you have manually set your thermostat at 75 degrees, the thermostat's job from that point on is to maintain that temperature, or a temperature within one or two degrees of that. If the thermostat didn't turn the air conditioner off periodically the house would get much cooler than desired; using up a large amount of (expensive) electricity, and over burdening the air conditioner compressor, prematurely wearing it out leading to a costly repair bill. You might look at as the thermostat giving the air conditioner a rest and your wallet a break. Many, if not most thermostats also serve another role which is to safeguard the electronic startup up equipment and motor of the air conditioning unit. You might experience this when attempting to turn the air conditioner back on within a few minutes of it having turned off. This is a built in safeguard feature which protects certain delicate components inside your air conditioner from premature burnout or an electrical overload. If you experience this it's best to wait ten minutes or so for the safety system to reset. Hope this answer was helpful. ---------------------------------------------------------------------------- Thanks for the reply, but when I said it "Shuts Off" it means that the Thermostat LED goes blank, as if there is no power to the syste.