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You may have had a voltage spike, power surge or the batteries may need to be replaced. If your thermostat takes batteries, for best results, you should replace batteries once a year with new premium brand. Most thermostats take either “AA” or “AAA” alkaline batteries. Before replacing the batteries turn the system off. Be sure the batteries are installed with the positive/negative at the correct ends. If this does not fix the problem call Prestige Air Conditioning for service.
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