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DS3311, DS4411, 409896, DS2205, DS2307
TROUBLESHOOTING GUIDE
HEATER (CONTINUED)
Problem
Heater fan runs
continuously
NOISE
Problem
Excessive noise
with the heater on
Grinding or
excessive noise
with the heater off
Cause
Loose wiring
Defective heater on/off switch
Defective heater assembly
Cause
Dirty blower assembly
Defective blower assembly
Moving flame rod hitting or
rubbing against internal
components
Defective flame motor
Solution
Trace wiring in unit
Replace heater on/off switch
Replace heater assembly
Solution
Clean blower assembly
Replace heater assembly
Flame rod replacement
Replace flame motor
Service Manual
Reference
Page 5
Page 13
Page 15
Service Manual
Reference
Page 15
Page 11
Page 11
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