Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater

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Heat will not come on.

The heat will not come on. Checked the fuse and replaced batteries - the air and fan work. I have white-rodgers 9910S - don't know if this has any bearing but we just returned from 10 days away.

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No heat troubleshooting
Diagnostic: Set SYSTEM Switch to HEAT and raise the setpoint above room temperature. Within a few seconds the thermostat should make a soft click sound. This sound usually indicates the thermostat is operating properly. If the thermostat does not click, try the reset operation listed above. If the thermostat does not click after being reset contact your heating and cooling service person or place of purchase for a replacement. If the thermostat clicks, contact the furnace manufacturer or a HVAC service
person to verify the heating is operating correctly.
If you need further support call the techline 18002842925.

Posted on Apr 07, 2010

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  • Sincerely,
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Reset the thermostat by pressing , UP,DOWN and TIME at the same time.

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