I have an older good Sears furnace. It was on cool mode this summer and the fan could come on. I can't find how to switch it back to heat mode!

Thanks. Linda


Depends on the specific setup of your system.

Some systems have a switch (typically labelled "Winter/Summer" IME) others just note if the thermostat is calling for heating or cooling.

Some thermostats have a "Cool-Off-Heat" mode switch on the thermostat itself.

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  • To clarify, the switch mentioned will be located on your thermostat inside your home where the indoor temperature is set. – user44735 Oct 20 '15 at 1:14
  • Thankyou so much! I can't get it. That's ok. We've tried various combinations. Only 3 buttons. First time this ever happened. I'll phone. Thanks. – Linda Oct 20 '15 at 6:14

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