27
Fan will
not run
heater
goes off
on limit
No
Bad
electrical
connection
Yes
Check
wiring
connection
Reset fan
control
settings
Fan runs in
manual
mode
Fan control
settings
incorrect
Yes
Yes
Yes
Yes
Yes
No
No
Faulty fan
control
Faulty fan
motor or
capacitor
Change fan
control
Change fan
motor or
capacitor
Fault finding cont’d
Burner
starts but
heater
goes to
overheat
No
Check air
inlet /
discharge not
restricted
Yes
Check for warm air
short circuit wiring to
air inlet
Remove
obstruction
clean filters
Insufficient
airflow over
heat
exchanger
Fan belts
slipping
/impellor
loose on
shaft
Yes
Yes
Yes
Yes
Yes
or
or
High return
air
temperature
Faulty fan /
limit stat
Adjust /replace
belts tighten
impellor
Change fan /
limit stat
Summary of Contents for HT2000
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