NO
YES
DEFINITION
Limit switches are safety devices
that will open when an abnormal
high temperature has been sensed.
REMOVE ALL JUMPER WIRING TO
SWITCHES!
Under no circumstances, shall these
switches be le" jumpered when not
troubleshoo#ng.
Verify filters and blower wheels are
clean
4.1 Fault Code
Open Reverse Air Flow Limit
Does motor
con#nue to run
during the en#re
hea#ng cycle?
Is temperature at
reverse flow switch
above
specifica#ons?
YES
NO
Verify motor harness
wiring for any loose
connec#ons
Replace reverse
air flow limit
Increase blower
off delay
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