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Lately we've been having a problem where the system is running the fan by itself. This is an American Standard Series 80 One-Stage with a Honeywell Chromotherm IV thermostat.
Right now the system is set for AC and the fan to AUTO. Most of the time everything is fine. But every couple of days (sometimes weeks) we would notice that the fan is running but not the compressor. In checking the thermostat it shows the fan as ON instead of AUTO. If we switch it to AUTO the fan stops and all is fine for a while (days or weeks).
Any clues or ideas?
Right now the system is set for AC and the fan to AUTO. Most of the time everything is fine. But every couple of days (sometimes weeks) we would notice that the fan is running but not the compressor. In checking the thermostat it shows the fan as ON instead of AUTO. If we switch it to AUTO the fan stops and all is fine for a while (days or weeks).
Any clues or ideas?