Furnace - Electronic Ignition Models (Continued) - Atwood AFS Series Training Manual

Defective limit switch
Furnace over fired
BLOWER SHUTS OFF AT SAME TIME BURNER SHUTS OFF
Faulty relay
Thermostat wired wrong
Furnace – Electronic Ignition Models (continued)
* * NOT COVERED UNDER WARRANTY
CAUSE
BURNER FAILS TO IGNITE AND - BLOWER FAILS TO RUN
No electrical power to the furnace
BLOWER VIBRATES OR IS NOISY
Motor mount loose
Damaged blower wheel
Motor shaft damaged
PILOT FAILS TO IGNITE OR STAY LIT
Plugged pilot orifice
Electrode out of adjustment
Pilot tube defective
Piezo sparker defective
Defective thermocouple
Defective valve
Vent kit not sealed
MICA window missing
Combustion air hose plugged or collapsed
Water in propane
Burner plate gasket or pilot gasket not sealed
LAZY FLAME (yellow)
High gas pressure
Burner out of adjustment
Combustion wheel installed backwards or loose (warranty
covered only when improperly installed at the factory)
Air leakage at gaskets
Low voltage
FAN RUNS CONTINUOUSLY WITH THERMOSTAT "OFF"
Shorted thermostat leads
Defective relay
Defective thermostat
INSUFFICIENT HEAT
Furnace under fired
Furnace limiting
c. All closeable registers must be fully open and unrestricted *
Replace limit switch
Set gas pressure to a minimum of 11" W.C. with all appliances running
replace regulator, if not obtainable. Also, check main burner orifice, it must
comply with furnace's specifications *
Replace relay
Correct wiring *
Reconnect or replace power source *
Tighten motor mounting bracket
a. Ducting must meet furnace's minimum requirements *
b. No excess ducting or unnecessary bends *
c. All closeable registers must be fully open and unrestricted
Replace blower wheel
Replace motor
Clean or replace pilot orifice
Adjust electrode to furnace's specifications
Replace tube
Replace sparker
Replace thermocouple
Replace valve
Seal vent where it meets with the furnace *
Replace MICA
Replace combustion hose
Add alcohol to the propane bottles *
Replace gaskets
Set gas pressure to a minimum of 11" W.C. with all appliances running
replace regulator, if not obtainable. Also, check main burner orifice, it must
comply with furnace's specifications *
Adjust burner according to furnace specification
Reposition wheel and tighten
Replace gaskets
Correct power supply *
Replace wire or wires *
Replace relay
Replace thermostat
1. Set gas pressure to 11" W.C. with all appliances running, replace
regulator if not obtainable. Also check main burner orifice, it must
comply with furnace's specifications
2. Check ducting and return air according to furnaces specifications *
Check ducting and return air. It must comply with furnace's specifications *
Notes:
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SOLUTION