VisionPro IAQ Error Codes

Article ID: 637

Last updated: 6 Feb, 2023

Honeywell Thermostat: VisionPro IAQ

Re: Error Codes

The VisionPro IAQ is a 3-wire communicating thermostat.

Error Codes:
027	Faulty thermostat	Replace thermostat
035	Duplicate thermostat zone detected	Check zone numbers in thermostat configuration
036	Duplicate UV timer
037	Duplicate Filter timer
038	Duplicate Humidifier Pad timer
039	Duplicate Indoor Humidity Sensor
040	Compressor Fault	Check fault input from equipment
050	Duplicate Outdoor Temperature Sensor
052	Faulty Post-Coil Discharge Air Sensor
053	Faulty Outdoor Temperature Sensor
054	Faulty Indoor Humidity Sensor
089	Heating/Cooling Equipment Missing	Not communicating with equipment or EIM
090	Data interface is continuously busy
091	Thermostat is not receiving data	Communication problem
118	Faulty Discharge Air Sensor
119	Faulty Temperature Sensor
121	Duplicate Post-Coil Discharge Sensor

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Article ID: 637

Last updated: 6 Feb, 2023

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