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Key to Press
Emergency Heat System Test (available only when using W8635B)
Cooling Equipment System Test
Fan and Damper Test Damper Test available only when using W8703A)
Key Operation Test
Press any key to test if the key is functional. Each time a key is pressed, a different number is displayed. This
indicates the key is functioning properly. Pressing
Thermostat Information
Exit Installer Test Mode
Run Program key
CHECKOUT
Outdoor Temperature Sensor
Allow the C7089B Outdoor Temperature Sensor to absorb the outdoor air for a minimum of five minutes before taking
a reading.
TROUBLESHOOTING GUIDE
Refer to Table 10 for troubleshooting information.
T8635L MICROELECTRONIC COMMUNICATING PROGRAMMABLE THERMOSTAT
Table 9. Installer System Test Options. (Continued)
Test Number
20
Enter Emergency Heat Equipment system test.
21
Emergency Heat turns on.
20
Emergency Heat turns off.
30
Enter Cooling Equipment system test.
31
First Stage Cool turns on.
32
Second Stage Cool turns on (W8635A only).
31
Second Stage Cool turns off (W8635A only).
30
First Stage Cool turns off.
40
Enter Fan and Damper test.
41
Fan turns on; damper for this zone opens.
42
Damper closes for this zone (if not already closed); fan stays on.
41
Damper opens for this zone.
40
Fan turns off.
60
Enter Key Operation test.
70
Enter Thermostat Information mode.
71
Production date code is displayed. The first two large digits are the month
and the third digit is the last digit of the year (example: 031 = March 2001).
72
Software identification code is displayed.
73
Software revision number is displayed.
74
EEPROM identification code is displayed.
Thermostat returns to normal operating mode.
Description
enters the next test.
15
69-1331—5
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