Tag: water-heater

All the articles with the tag "water-heater".

• Whirlpool Water Heater E07 Error - Causes & Fix

  31 May, 2026

  E07 means lower thermistor sensor failure. Check wiring at the electronic thermostat first, then replace the lower sensor if connections are good.

• Whirlpool Water Heater E03 Error Code - Causes & Fix

  31 May, 2026

  E03 means upper thermistor sensor failure in the Electronic Thermostat assembly. Replace the ET to clear the code on most models.

• Whirlpool E02 Error Code - Causes & Fix

  31 May, 2026

  E02 means your Whirlpool water heater exceeded its high-limit safety temperature. Turn off power, press reset, restore power. If it returns, call a tech.

• GE Water Heater F81 Error Code - Causes & Fix

  31 May, 2026

  F81 on a GE GeoSpring water heater means the leak sensor battery is low. Replace the battery to clear the fault and restore normal operation.

• GE Water Heater F78 Error - Causes & Fix

  31 May, 2026

  F78 on a GE water heater is not documented. Verify your model number, as this code may be misread or apply to another appliance.

• GE Water Heater F75 Error Code - Causes & Fix

  31 May, 2026

  F75 = dry tank fault on GE GeoSpring heat pump water heaters. The tank is empty or not properly filled. Confirm water supply is on and tank is full.

• GE Water Heater F62 Error Code - Causes & Fix

  31 May, 2026

  F62 means incoming water is too hot. Reduce any preheating of inlet water or check for hot/cold cross-connection in plumbing.

• GE Water Heater F74 Error Code - Causes & Fix

  31 May, 2026

  F74 on a GE GeoSpring means the air filter is dirty. Clean or replace the filter. If the code returns, a refrigerant leak is likely.

• GE Water Heater F61 Error Code - Causes & Fix

  31 May, 2026

  F61 means tank water temperature is too hot. In most cases it self-corrects. If it persists, check setpoint and inlet conditions.

• A.O. Smith Water Heater E4 Error Code - Causes & Fix

  31 May, 2026

  E4 (or E04) on A.O. Smith electric tankless heaters means moisture or a leak detected inside the unit. Shut off power and water, find the leak, dry the cabinet, then test.

• A.O. Smith E2 Error Code - Causes & Fix

  31 May, 2026

  E2 means water temperature exceeded the high limit. Press the reset button on the thermostat. If the code returns, replace the control.

• Rheem A01 Error Code - Causes & Fix

  31 May, 2026

  A01 means maximum ignition attempts: the burner failed to light and prove flame. Check gas supply and flame sensor first.

• State Tankless E65 Error - Causes & Fix

  31 May, 2026

  E65 is not a verified State tankless code. Check your model's actual fault list, then inspect gas supply, venting, and scale buildup.

• State E52 Error Code - Causes & Fix

  31 May, 2026

  E52 means communication failure between the display and control board. Check wiring connections first, then replace faulty components.

• State Tankless Water Heater E03 Error Code - Causes & Fix

  31 May, 2026

  E03 on State tankless heaters usually signals overheat or low water flow. Check your model manual, clean the inlet filter, and verify flow.

• State Tankless Water Heater E02 Error - Causes & Fix

  31 May, 2026

  E02 means your State tankless heater detected water over the safe temperature limit. Most often the thermistor sensor is faulty.

• Ruud E99 Error Code - Causes & Fix

  31 May, 2026

  E99 on a Ruud tankless water heater means exhaust blower or vent fault. Most often fixed by clearing blocked vents or replacing the blower.

• Ruud Tankless E12 Error Code - Causes & Fix

  31 May, 2026

  E12 is a flame-failure fault: the heater tried to ignite but could not prove a stable flame. Check gas supply and clean the flame rod.

• Ruud E11 Error Code - Causes & Fix

  31 May, 2026

  E11 means ignition failure: the burner won't light or flame isn't detected. Most common fix: clean the flame rod and igniter.

• Ruud E05 Error Code - Causes & Fix

  31 May, 2026

  E05 on a Ruud tankless water heater signals a water flow problem. The most common fix is cleaning the inlet filter screen.

• Ruud E03 Error Code - Causes & Fix

  31 May, 2026

  E03 on a Ruud tankless water heater means overheat shutdown. Usually caused by low water flow or scale buildup in the heat exchanger.

• Ruud E02 Error Code - Causes & Fix

  31 May, 2026

  E02 means high-temperature or overheat fault. The water heater detected unsafe heat and shut down. Lower the setpoint or check sensors.

• Bosch C1 Error Code - Causes & Fix

  31 May, 2026

  C1 means blocked flue or combustion air during startup. Most often caused by obstructed intake/exhaust vent or dirty air filter.

• Bosch E4 Error Code - Causes & Fix

  31 May, 2026

  E4 means backflow temperature over 309°F. Most often caused by blocked venting or a failed secondary fan. Check vent and fan first.