7
Call for Heat – Unit Does Nothing
The below troubleshooting steps refer to situations where the green light on the control
board is ON:
Step 1: Verify that the thermostat is wired correctly and there is a call for heat.
Step 2: Verify that the thermostat is wired between the R & W terminals on
the terminal strip.
Step 3: Once you’ve veried that the thermostat is wired correctly and the unit still
does not operate, then:
• Turn power off
• Remove thermostat wires
• Carefully install a jumper wire between terminals R & W directly on the
control board
• Turn power on (Be aware that the unit may start!)
Step 4: If the installation of a jumper wire resolved the issue, then proceed to the next
step. If, however, the installation of a jumper wire did not solve the issue,
please turn to page 8.
Step 5: If unit operates correctly when a jumper wire is installed between terminals
R & W on the board, check the eld wiring to the thermostat and verify the
wiring, replacing the thermostat if needed.
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