Piper SEMINOLE PA-44-180, Maintenance Manual

Page: 114 / 881

CHART 2101. TROUBLESHOOTING (JANITROL HEATER) (cont)
Trouble Cause Remedy
Heater fails to light. (cont) Combustion air pressure switch Check for low blower output
open. (Defective switch or low due to low voltage and correct
combustion air blower output.) it. If switch is defective,
replace it.
Cycling switch open. Replace if defective.
Duct switch open. Operate control to see if
switch will come on. Replace
switch if defective.
Ventilating air blower fails Heater switch “OFF.” Energize the heater switch.
to run. Broken or loose wiring to Check and repair wiring.
motor.
Circuit breaker open. Close circuit breaker.
Worn motor brushes. Replace motor brushes.
Blower wheel jammed. Remove and check the ventilating
air blower wheel and
realign if necessary.
Motor burned out. Remove blower assembly and
replace motor.
Defective radio-noise filter. Replace filter.
Combustion air blower fails Faulty wiring to motor. Inspect and replace faulty
to run. wiring.
Poor ground connection. Tighten ground screw. Be sure
any metal preservation has
been removed for good ground
connection.
Worn motor brushes. Replace motor brushes.
Blower wheel jammed. Overhaul the combustion
(Usually indicated by hot air blower.
motor housing.)
Defective radio-noise filter. Replace filter.
Faulty or burned out motor. Remove combustion air
motor for overhaul or replacement
of motor.
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
2 1 - 0 2 - 0 0
Page 21-03
Revised: May 15, 1989
1E18
PIPER AIRCRAFT