Trouble Shooting Chart - COZY WOW253 Installation And Operating Instructions Manual

SYMPTOM
Flame too large
Yellow burner flame
Gas odor
Delayed Ignition
Failure to ignite
Burner won't turn off
Incorrect gas input
Not enough heat
Too much heat
Main burner goes out
during normal operation

TROUBLE SHOOTING CHART

POSSIBLE CAUSES
1. Defective operator section of valve.
2. Burner orifices too large.
3. If installed above 2,000 ft.
1. Clogged burner ports.
2. Obstruction around air intake or.
exhaust tubes.
1. Gas leak.
1. Low gas pressure.
2. Ignitor not properly located.
1. Main gas off.
2. Thermostat not set high enough to call
for heat.
3. Clogged burner orifice.
4. Incorrect wiring.
5. Defective valve.
6. No power to unit.
7. Defective pressure switch.
1. Defective or damaged thermostat wire,
or thermostat.
2. Thermostat location.
3. Defective or sticking valve.
4. Excessive gas pressure.
5. Defective or damaged thermostat.
6. Defective gas valve.
1. Gas input not checked.
2. Clogged orifice.
1. Furnace undersized.
2. Temperature set too low.
3. Low supply pressure.
1. Temperature dial set too high.
2. Gas control valve stuck open.
1. Defective flame sensor.
2. Input too high.
3. Defective gasket.
4. Missing gasket.
5. Limit switch opens.
6. Exhaust or air intake tubes blocked.
1. Replace valve.
2. See installation instructions or
3. See burner orifice section, Page 13.
1. Remove burners and check for
2. Remove obstruction.
1. See Page 1.
1. Check gas supply pressure.
2. Check ignitor location and correct if
1. Open all manual gas valves.
2. Set thermostat to higher temperature.
3. Clean burner orifice (do not enlarge).
4. Check wiring diagram.
5. Replace valve.
6. Check power supply.
7. Replace pressure switch.
1. Can be checked by removing wire from
2. Re-locate thermostat out of drafts, hot, or
3. Replace valve.
4. Contact utility supplying gas.
5. Replace thermostat.
6. Replace gas valve.
1. Re-check gas input.
2. Clean orifices with a smooth wood
1. This is especially true when a dwelling
2. Raise thermostat setting.
3. Check supply pressure.
1. Lower thermostat setting.
2. Replace gas control valve.
1. Check voltage and replace ignitor if low.
2. Check input rate.
3. Check and replace gasket if needed.
4. Be sure all gaskets are in place and
5. Check rate - remove any obstructions to
circulating air.
6. Remove obstruction. Check for snow
Page 23
CORRECTIVE ACTION
check with local gas company for proper
orifice size and replace as needed.
obstructions in throats, ports, and
orifices. Clean - but do not enlarge ports
or orifices.
necessary.
control board terminal. If burner goes off,
replace thermostat.
cold spots.
toothpick, do not enlarge.
or room is enlarged. Have the heat loss
calculated and compare to furnace
output. Your gas company can supply
you with this information.
properly sealed.
accumulation blocking intake and/or
exhaust tube.