Honeywell YRTH7500D1009 Quick Installation Guide - Page 26
Troubleshooting
UPC - 085267257244
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SETUP WIRING 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 Cannot change system setting to Cool Fan does not turn on when heat is required Heating system is running in cool mode Red light is on Make sure fresh AA alkaline batteries are properly installed (see page 7). Check Function 0170: System Type to make sure it is set to match your heating and cooling equipment (see page 16). Check Function 0180: Heating Fan Control to make sure it is set to match your heating equipment (see page 17). Check Function 0170: System Type to make sure it is set to match your heating and cooling equipment (see page 16). If thermostat is in Emergency Heat mode the red light is normal. It shows that the thermostat is in emergency heat mode. If thermostat is not in Emergency Heat mode, contact a qualified service contractor for repair. ASSISTANCE TROUBLESHOOTING 69-2487ES-01 24