T8600D CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS
Heating or cooling
Heat or cool circuit is opening
up or becoming high
System on indicator
Fan operation set for 0 (con-
ventional heat) when it should
be set for 1 (electric heat).
displayed, but no
Conventional heating equipment
warm or cool air is
turns on the fan when the
coming from the
furnace has warmed up to a
Heating or cooling equipment is
Option not activated.
ture not displayed
Outdoor sensor is connected
display is incorrect
Automation and Control Solutions
1985 Douglas Drive North
Golden Valley, MN 55422
G.H. Rev. 11-02
Table 6. Troubleshooting Guide. (Continued)
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Add resistor in parallel with load or install interface relay.
Enter Installer Setup number 2 and reconfigure the fan
Wait a minute after seeing the on indicator and then check the
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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