9 models · 126 error codes
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1-FLASH
Normal Operation — System OK
2-FLASH
Thermopile Voltage Low
4-FLASH
High Temperature / ECO Trip
5-FLASH
Temperature Sensor Failure
7-FLASH
Gas Control Valve Electronics Failure
8-FLASH
Power Interruption / Loss of Pilot Signal
LED-OFF
No Power to Gas Control — LED Dark
MECH-NO-HOT-WATER
No Hot Water
MECH-PILOT
Pilot Light Won't Stay Lit
MECH-TPR-VALVE
T&P Relief Valve Leaking or Dripping
MECH-LEAK
Tank Leaking from Bottom
MECH-SEDIMENT
Sediment Buildup — Rumbling or Popping Noise
MECH-ANODE
Anode Rod Depleted — Rotten Egg Smell or Corrosion
MECH-DIP-TUBE
Broken Dip Tube — Lukewarm Water
1-FLASH
Normal Operation — System OK
2-FLASH
Thermopile Voltage Low
4-FLASH
High Temperature / ECO Trip
5-FLASH
Temperature Sensor Failure
7-FLASH
Gas Control Valve Electronics Failure
8-FLASH
Power Interruption / Loss of Pilot Signal
LED-OFF
No Power to Gas Control — LED Dark
MECH-NO-HOT-WATER
No Hot Water
MECH-PILOT
Pilot Light Won't Stay Lit
MECH-TPR-VALVE
T&P Relief Valve Leaking or Dripping
MECH-LEAK
Tank Leaking from Bottom
MECH-SEDIMENT
Sediment Buildup — Rumbling or Popping Noise
MECH-ANODE
Anode Rod Depleted — Rotten Egg Smell or Corrosion
MECH-DIP-TUBE
Broken Dip Tube — Lukewarm Water
1-FLASH
Normal Operation — System OK
2-FLASH
Thermopile Voltage Low
4-FLASH
High Temperature / ECO Trip
5-FLASH
Temperature Sensor Failure
7-FLASH
Gas Control Valve Electronics Failure
8-FLASH
Power Interruption / Loss of Pilot Signal
LED-OFF
No Power to Gas Control — LED Dark
MECH-NO-HOT-WATER
No Hot Water
MECH-PILOT
Pilot Light Won't Stay Lit
MECH-TPR-VALVE
T&P Relief Valve Leaking or Dripping
MECH-LEAK
Tank Leaking from Bottom
MECH-SEDIMENT
Sediment Buildup — Rumbling or Popping Noise
MECH-ANODE
Anode Rod Depleted — Rotten Egg Smell or Corrosion
MECH-DIP-TUBE
Broken Dip Tube — Lukewarm Water
MECH-ECO-TRIP
ECO (Energy Cut Off) Tripped — Red Reset Button
MECH-ELEMENT-UPPER
Upper Heating Element Failed
MECH-ELEMENT-LOWER
Lower Heating Element Failed
MECH-THERMOSTAT
Thermostat Failure — Wrong Temperature
MECH-NO-HOT-WATER
No Hot Water — Complete Loss
MECH-INSUFFICIENT-HOT
Not Enough Hot Water — Runs Out Quickly
MECH-TPR-VALVE
T&P Relief Valve Leaking or Dripping
MECH-LEAK
Tank Leaking from Bottom
MECH-SEDIMENT
Sediment Buildup — Popping Noise or Reduced Efficiency
MECH-ANODE
Anode Rod Depleted — Rotten Egg Smell or Corrosion
MECH-ECO-TRIP
ECO (Energy Cut Off) Tripped — Red Reset Button
MECH-ELEMENT-UPPER
Upper Heating Element Failed
MECH-ELEMENT-LOWER
Lower Heating Element Failed
MECH-THERMOSTAT
Thermostat Failure — Wrong Temperature
MECH-NO-HOT-WATER
No Hot Water — Complete Loss
MECH-INSUFFICIENT-HOT
Not Enough Hot Water — Runs Out Quickly
MECH-TPR-VALVE
T&P Relief Valve Leaking or Dripping
MECH-LEAK
Tank Leaking from Bottom
MECH-SEDIMENT
Sediment Buildup — Popping Noise or Reduced Efficiency
MECH-ANODE
Anode Rod Depleted — Rotten Egg Smell or Corrosion
1-FLASH
Normal Operation — System OK
2-FLASH
Thermopile Voltage Low
4-FLASH
High Temperature / ECO Trip
5-FLASH
Temperature Sensor Failure
7-FLASH
Gas Control Valve Electronics Failure
8-FLASH
Power Interruption / Loss of Pilot Signal
LED-OFF
No Power to Gas Control — LED Dark
MECH-NO-HOT-WATER
No Hot Water
MECH-PILOT
Pilot Light Won't Stay Lit
MECH-TPR-VALVE
T&P Relief Valve Leaking or Dripping
MECH-LEAK
Tank Leaking from Bottom
MECH-SEDIMENT
Sediment Buildup — Rumbling or Popping Noise
MECH-ANODE
Anode Rod Depleted — Rotten Egg Smell or Corrosion
MECH-DIP-TUBE
Broken Dip Tube — Lukewarm Water
1-FLASH
Normal Operation — System OK
2-FLASH
Thermopile Voltage Low
4-FLASH
High Temperature / ECO Trip
5-FLASH
Temperature Sensor Failure
7-FLASH
Gas Control Valve Electronics Failure
8-FLASH
Power Interruption / Loss of Pilot Signal
LED-OFF
No Power to Gas Control — LED Dark
MECH-NO-HOT-WATER
No Hot Water
MECH-PILOT
Pilot Light Won't Stay Lit
MECH-TPR-VALVE
T&P Relief Valve Leaking or Dripping
MECH-LEAK
Tank Leaking from Bottom
MECH-SEDIMENT
Sediment Buildup — Rumbling or Popping Noise
MECH-ANODE
Anode Rod Depleted — Rotten Egg Smell or Corrosion
MECH-DIP-TUBE
Broken Dip Tube — Lukewarm Water
1-FLASH
Normal Operation — System OK
2-FLASH
Thermopile Voltage Low
4-FLASH
High Temperature / ECO Trip
5-FLASH
Temperature Sensor Failure
7-FLASH
Gas Control Valve Electronics Failure
8-FLASH
Power Interruption / Loss of Pilot Signal
LED-OFF
No Power to Gas Control — LED Dark
MECH-NO-HOT-WATER
No Hot Water
MECH-PILOT
Pilot Light Won't Stay Lit
MECH-TPR-VALVE
T&P Relief Valve Leaking or Dripping
MECH-LEAK
Tank Leaking from Bottom
MECH-SEDIMENT
Sediment Buildup — Rumbling or Popping Noise
MECH-ANODE
Anode Rod Depleted — Rotten Egg Smell or Corrosion
MECH-DIP-TUBE
Broken Dip Tube — Lukewarm Water
MECH-BLOWER
Power Vent Blower Motor Failure
MECH-PRESSURE-SWITCH
Pressure Switch Failure — Won't Ignite
MECH-VENT-BLOCKED
Vent System Blocked or Restricted
MECH-CONDENSATE
Condensate Drain Clogged
1-FLASH
Normal Operation — System OK
2-FLASH
Thermopile Voltage Low
4-FLASH
High Temperature / ECO Trip
5-FLASH
Temperature Sensor Failure
7-FLASH
Gas Control Valve Electronics Failure
8-FLASH
Power Interruption / Loss of Pilot Signal
LED-OFF
No Power to Gas Control — LED Dark
MECH-NO-HOT-WATER
No Hot Water
MECH-PILOT
Pilot Light Won't Stay Lit
MECH-TPR-VALVE
T&P Relief Valve Leaking or Dripping
MECH-LEAK
Tank Leaking from Bottom
MECH-SEDIMENT
Sediment Buildup — Rumbling or Popping Noise
MECH-ANODE
Anode Rod Depleted — Rotten Egg Smell or Corrosion
MECH-DIP-TUBE
Broken Dip Tube — Lukewarm Water
MECH-BLOWER
Power Vent Blower Motor Failure
MECH-PRESSURE-SWITCH
Pressure Switch Failure — Won't Ignite
MECH-VENT-BLOCKED
Vent System Blocked or Restricted
MECH-CONDENSATE
Condensate Drain Clogged
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