Troubleshooting Guide
IF…
Display will not come on.
Temperature display will not go lower than 45°F (7°C) or higher than 88°F (31°C) during programming.
Temperature change occurs at the wrong times.
Heating will not come on.
THEN…
■Set the system switch to OFF. Remove batteries. Insert backward for at least five seconds to reset thermostat. Correctly replace batteries. Display should come on.
■Make sure batteries are fresh and installed correctly.
■Gently clean battery contacts using a soft pencil eraser. Do not use anything abrasive on the clips.
■The temperature setting limit is reached. The setting range is 45°F to 88°F (7°C to 31°C).
■Check program times for the period in question. Be sure that AM and PM indications are correct. Make sure the current day and time are correct. Reprogram if neces- sary.
■Check that switch on thermostat is set to HEAT. Allow a minimum of five minutes for
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