Honeywell MHK1 Error Codes

Article ID: 114

Last updated: 16 Dec, 2022

Honeywell MHK1 RedLink Programmable Thermostat for Mitsubishi

The MHK1 thermostat kit consists of a MRCH1 Honeywell RedLink Wireless Thermostat and a MIFH1 Wireless Receiver that mounts and wires to a Mitsubishi indoor unit.

Error Code	Description
E0 27	Temperature out of range. Verify device temperature is within operating range. If within range for at least 30 minutes and problem persists, replace thermostat.
E0 91	Communication has been lost for more than 10 minutes. Check cable connection. Try replacing the cable.
E1 29	Attempting to connect incompatible wireless device.
E1 34	Low signal strength. Move thermostat closer to receiver.
E1 38	Make sure "Connect" light on receiver is flashing and thermostat is at least 2ft away from receiver.
E1 54	Indoor unit does not support wireless receiver.

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Article ID: 114

Last updated: 16 Dec, 2022

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