I need some help. I have a York Heat pump unit with a Honeywell basic thermostat (unit also serves as an AC in summer). Evereything has been working fine until this weekend when we discovered that the outside compressor unit would not turn off. Nothing I would do to the thermostat would make the thing turn off outside. I ended up pulling the disconnect at the pigtail outside to get it to shut off.
Any ideas on troubleshooting this or should I call a professional?
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