Our thermostat is 21 years old. It is a Maple Chase. No model number on it. Everything stopped working today. Outside and inside unit. We have replaced the batteries. The thermostat has a display, will change temperatures but the unites are not responding. Circuit breakers have been checked. Two questions
1) - What is the black switch behind the cover?
2) - Any suggestions?
Hot in California!
1) - What is the black switch behind the cover?
2) - Any suggestions?
Hot in California!
Display works but nothing else does
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