5
Check all terminal/plug connections both at the
furnace/air-handler or outdoor unit control board
and at the motor.
Always disconnect power
to the system before disconnecting and
reconnecting plugs.
Look for:
Loose plugs and/or loose pin connections in
the plug.
Burnt, bent or loose pins or seats.
Confirm there are no limits, rollouts or safeties
tripped. Also check for any fault codes present
on the furnace/air-handler or outdoor unit control
boards.
If fault codes are present, follow the
manufacturer’s recommendations to resolve
the problem.
If these checks do not solve the problem, or if a
fault code reveals a motor problem, read the Tech
Tips on page 6, and go to the “Motor ID” section
on page 7 to identify the motor. Then go to the
corresponding motor section in this guide for
additional diagnostics.
4.
5.
6.
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