Honeywell RTH8500D Installationsanleitung
Advanced Installation Guide
69-2219EF—03 24
Troubleshooting
SETUP
WIRING
ASSIST
ANCE
TROUBLESHOO
TING
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 fresh AAA alkaline
batteries are properly installed
(see page 7).
Cannot change
system setting
to Cool
system setting
to Cool
• Check Function 0170: System
Type to make sure it is set to
match your heating and cooling
equipment (see page 16).
Fan does not
turn on when
heat is required
turn on when
heat is required
• Check Function 0180: Heating
Fan Control to make sure it is set
to match your heating equipment
(see page 17).
“Wait” appears
on the screen
on the screen
• Compressor protection feature is
engaged. Wait 5 minutes for the
system to restart safely, without
damage to the compressor.
Heat pump
issues cool air
in heat mode, or
warm air in cool
mode
issues cool air
in heat mode, or
warm air in cool
mode
• Check Function 0190: Heat Pump
Changeover Valve to make sure
it is properly configured for your
system (see page 17).