T8601D CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS
69-1626
10
a
Select models.
Heating or cooling
come on
momentarily and
shut off.
Heat or cool circuit is
opening up or becoming
high impedance.
Add resistor in parallel with load or install interface relay.
System on
indicator
(flame=heat,
snowflake=cool)
is displayed, but
no warm or cool
air is coming from
the registers.
Fan operation set for 0
(conventional heat) when it
should be set for 1 (electric
heat).
Enter Installer Setup number 2 and reconfigure the fan operation.
Conventional heating
equipment turns on the fan
when the furnace has
warmed up to a setpoint.
Wait a minute after seeing the on indicator and then check the
registers.
Heating or cooling
equipment is not operating
Verify operation of heating or cooling equipment in self-test.
Outdoor
temperature not
displayed.
a
Option not activated.
Enter Installer Setup number 24 and set to 1. Thermostat must have
OT terminals and a C7089B1000 installed.
Outdoor
temperature
display is
incorrect.
a
Outdoor sensor is
connected incorrectly.
Refer to C7089B1000 installation instructions and check wiring
between the thermostat and sensor.
Wrong sensor.
Replace sensor with C7089B1000 sensor.
Table 6. Troubleshooting Guide.
Symptom
Possible Cause
Action
