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TROUBLESHOOTING CHART
PROBLEM
POSSIBLE CAUSE(S)
CORRECTIVE ACTION
NO HOT WATER
1. Transformer unplugged.
2. No power at outlet.
3. Thermostat defective.
4. Air Intake Chamber Fan defective.
5. Pressure Switch defective.
6. Gas Valve/Thermostat Switch in
“OFF POSITION”.
1. Plug transformer back into 120 VAC. outlet.
2. Repair service to outlet.
3. Replace Thermostat.
4. Replace Air Intake Chamber Fan Assembly.
5. Replace Pressure Switch Assembly.
6. Move Gas Valve/Thermostat Switch to “ON
POSITION”.
INSUFFICIENT HOT WATER
1. Thermostat set too low.
2. Thermostat defective.
3. Heater undersized.
4. Low gas pressure.
5. Incoming water is unusually cold.
6. Leaking hot water pipes or fixtures.
1. Set temperature control higher.
2. Replace thermostat.
3. Reduce hot water use.
4. Contact dealer.
5. Allow more time for heater to reheat.
6. Have plumber check and repair leaks.
SLOW HOT WATER
RECOVERY
1. Insufficient secondary air.
2. Water heater flue or vent system
blocked.
3. Low gas pressure.
4. Improper calibration.
5. Thermostat set too low.
6. Water heater too small.
7. Wrong piping connections.
8. Wasted hot water.
1. Provide ventilation to water heater. Check flue
way, flue baffle, and burner.
2. Clean flue, locate source and correct.
3. Check with gas utility company.
4. Replace thermostat.
5. Turn temperature dial to desired setting.
6. Install adequate heater.
7. Correct piping-dip tube must be in cold inlet.
8. Advise customer.
WATER TOO HOT
1. Thermostat set too high.
1. Set temperature control lower.
see, “WATER TEMPERATURE REGULA-
TION”, section.
VENT PIPE TOO
HOT(ABOVE 170°F)
1. Defective air flow restrictor.
2. Not enough dilution air to mix with
flue gases in inlet elbow.
3. Dilution air too hot for mixing with
flue gases.
4. Wrong burner orifice.
1. Take unit out of service immediately, call a
qualified person to service the unit.
2. Proper dilution air must be provided for
combustion and dilution of flue temp. See
“COMBUSTION AIR SUPPLY/VENT PIPE
SYSTEM”, section.
3. Supply air is too hot, check for heat sources
around intake terminal and blockage of dilu-
tion air leg.
4. Install correct orifice.
BURNER FLAME
YELLOW - LAZY
1. Dirt in burner ports.
2. Combustion air path restricted.
3. Not enough dilution air for proper
combustion.
4. Main burner line clogged.
5. Obstruction in main burner orifice.
6. Burner flame too high.
7. Flame burns at orifice/thermostat
not functioning properly.
8. Low gas pressure.
1. Turn off heater and gas, clean burner head.
2. Check intake venting arrangements for ob-
structions.
3. Check intake venting arrangements for ob-
sructions.
4. Clean, locate source and correct.
5. Clean or replace orifice.
6. Replace with correct orifice.
7. Replace thermostat
8. Check with gas utility company.
BURNER FLAME FLOATS
AND LIFTS OFF PORTS
1. Orifice too large.
2. High gas pressure.
3. Water heater flue or vent system
blocked.
4. Cold drafts.
1. Replace with correct-orifice.
2. Check with gas utility company.
3. Clean flue and burner-locate source and cor-
rect.
4. Locate source and correct.
Pressurized Combustion Chamber System
Operational Checklist
1. Manifold gasket properly sealed.
2. Viewport not damaged or cracked.
3. Combustion chamber free of debris and undamaged.
4. Manifold component block properly installed.
5. No leaks at manifold connection.
6. Manifold door screws securely tightened.
