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Step 3: Testing the Thermostat
WARNING: DO NOT SHORT (JUMPER) ACROSS TERMINALS OF GAS
VALVE OR SYSTEM CONTROL TO TEST OPERATION. THIS WILL
DAMAGE THE THERMOSTAT AND VOID YOUR WARRANTY.
1. Put the HEAT-OFF switch into
the HEAT position. The display will read HEAT.
2. Press the ٙ button until the temperature
setting is at least 3 degrees above room
temperature. The heating system should
turn on. The fan may not turn on immediately,
depending on the fan delay built into the furnace.
The flame icon will be displayed.
3. Put the HEAT-OFF switch into
the OFF position. The heating system should
turn off. The fan may continue to run for a
short period of time.
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