Honeywell T8090T Owner's Manual - Page 19

Troubleshooting (continued) PROBLEM Clock does not run. Thermostat setting and thermometer reading disagree. CHECK -voltage across the C and R terminals. -level position of thermostat. ACTION Remove thermostat from the wallplate or subbase, and measure the voltage. Refer to page 20 for cause and action. Reinstall thermostat wallplate or subbase. Use a spirit level. -area around thermostat for drafts or radiant heat. -calibration of thermometer. Thermostat should be about 5 ft [1.5m] above floor on an inside wall. Contact qualified service technician for change of location. See instructions on page 22. 1 Applicable on zone 1 thermostat only. 2 Not applicable on heating-only system. If this Troubleshooting section has not solved the problem, call a qualified Trol-A-Temp® customer service at or service technician, 1-800-828-8367 for additional assistance. 19 69-0432-1