My gas furnace will run one cycle and then not come back on until the switch is reset. Once the switch is reset it will kick on immediately run once and again I will have to reset before it will kick on again. It only does this when the temp outside drop below 30. When it is above 30 degrees outside it runs perfectly fine. Its always usually set at anywhere from 65 to 72 degrees but it could be 45 degrees in the house and still will not come back on until reset.
Things you should know:
- This is the first year this furnace has been used in approximately 18 years.
- It had apparently been red tagged due to needing a new thermostat.
- I just had the thermostat replaced about a month ago.