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Installation Guide
69-1816EFS—03 8
Accessories
Please contact your distributor to order replacement parts.
Outdoor temperature sensor ............................Part number C7089U1006
Remote indoor temperature sensor .................Part number C7189U1005
Discharge air temp. sensor ..............................Part number C7835A1009
Energy recovery ventilator ................................Part number ER200B2006
Heat recovery ventilator ...................................Part number HR200B1005
Fresh air damper ...............................................Part number EARD6
2-Channel Telephone access module .............Part number W8735D1009
4-Channel Telephone access module .............Part number W8735D1017
Bypass flow-through or steam humidifier .......Part number HE265A1007
UV air purifier .....................................................Part number UV100E1043
Cover plate ........................................................Part number 32003796-001
(Use to cover marks left by old thermostats.)
*Contact your dealer or Honeywell rep for a complete list of compatible products.
Error codes
027 Faulty thermostat (must be replaced)
035 Duplicate thermostat zone detected
036 Duplicate UV timer
037 Duplicate filter timer
038 Duplicate humidifier pad timer
039 Duplicate indoor humidity sensor
040 Compressor should be running but it is not
050 Duplicate outdoor temperature sensor
052 Faulty post-coil air discharge sensor
053 Faulty outdoor temperature sensor
054 Faulty indoor humidity sensor
089 Heating/cooling equipment is missing
090 Data interface is continuously busy
091 Thermostat is not receiving data from other equipment
118 Faulty discharge air temperature sensor
119 Faulty temperature sensor
121 Duplicate post-coil air discharge sensor