Troubleshooting - Honeywell RTH2510 Quick Installation Manual

Advanced Installation Guide

Troubleshooting

If you have difficulty with your thermostat, please try the
following suggestions. Most problems can be corrected
quickly and easily.
Display is blank • Make sure furnace door is closed
Heating or
cooling system
does not
respond
69-2726EF—01
securely.
• Make sure fresh AAA alkaline
batteries are correctly installed
(see page 7).
• Set System switch to Heat. Make
sure the temperature is set higher
than the Inside temperature.
• Set System switch to Cool. Make
sure the temperature is set lower
than the Inside temperature.
• Check circuit breaker and reset if
necessary.
• Make sure heating & cooling power
switches are on.
• Make sure furnace door is securely
closed.
• Wait 5 minutes for the system to
respond.
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