Honeywell Chronotherm T8601D Installation Instructions Manual page 10

T8601D CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS
Symptom
Heating or cooling Heat or cool circuit is
come on opening up or becoming
momentarily and high impedance.
shut off.
System on Fan operation set for 0
indicator (conventional heat) when it
(flame=heat, should be set for 1 (electric
snowflake=cool) heat).
is displayed, but
Conventional heating
no warm or cool
equipment turns on the fan
air is coming from
when the furnace has
the registers.
warmed up to a setpoint.
Heating or cooling
equipment is not operating
Outdoor Option not activated.
temperature not
a
displayed.
Outdoor Outdoor sensor is
temperature connected incorrectly.
display is
Wrong sensor.
a
incorrect.
a
Select models.
69-1626
Table 6. Troubleshooting Guide.
Possible Cause
Add resistor in parallel with load or install interface relay.
Enter Installer Setup number 2 and reconfigure the fan operation.
Wait a minute after seeing the on indicator and then check the
registers.
Verify operation of heating or cooling equipment in self-test.
Enter Installer Setup number 24 and set to 1. Thermostat must have
OT terminals and a C7089B1000 installed.
Refer to C7089B1000 installation instructions and check wiring
between the thermostat and sensor.
Replace sensor with C7089B1000 sensor.
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Action