Question about Honeywell Programmable Thermostat Heater
Error message 89 means "Heating/cooling equipment is missing"
Usually this means that the wiring to the thermostat is not making a connection. This could be a loose connection, broken wire, or failed equipment. You may also want to check the fuse/s to your Outside compressor unit.
You should have an hvac technician test your equipment, wiring, etc. in order to prevent damage to your equipment, and possibly yourself.
Posted on May 29, 2011
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Posted on Jan 02, 2017
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