Filter
Top Products
Troubleshooting tips.
No display Check for 24 VAC at thermostat;
display is blank when 24 VAC is
not present.
System fan does not Verify that wiring is correct.
come on properly
Thermostat turns on and Adjust temperature differential
off too frequently (see Temperature Differential,
Stage 1).
Fan runs continuously Check Fan Auto/On switch. If set to
ON position, fan will run continuously.
Room temperature is Verify that wall hole is plugged
not correct with putty or insulation; calibrate
thermostat (see Configuration mode).
Auxiliary heat not on Adjust differential for 2nd stage
soon enough (RAK148D1 only) heating, if required
(see Configuration mode).
Compressor doesn’t run There is a 3 minute time delay and
or turn off immediately a 3 minute minimum run time for
when changing function the compressor when it turns on/off.
or setting
Fan doesn’t run or turn off This is normal. On some models, the
immediately when changing fan may have a 3 minute minimum
function or setting run time/off time delay.
Problem not listed above Press the Reset button once;
display will be refreshed.
Problem Solution
Operating functions.
Heat
• In this mode, the thermostat
controls the heating system.
• Press the or buttons to set
the desired temperature.
>
<
Standby
Set
12