Honeywell T8090A/191108A Thermostat User Manual


 
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Troubleshooting
(continued)
(continued)
Problem Check Action
Clock does not run
(continued).
pins in program dial. If pins are
not completely seated in program
dial, jamming with index wheel
may occur.
Push down on pins to make sure they are
completely seated in program dial.
Clock loses time. power. May be interrupted. Make sure power is on. Reset clock.
high limit control. If clock powered
through system transformer,
power to clock and equipment
may be off on safety.
Wire separate transformer to power clock, or
install backup batteries as shown on page 8.
filter. May be clogged. Safety
limit on equipment may cut off
power to system.
Replace filter and reset clock.