How to diagnose and repair a faulty atmospherically vented gas fired water heater.
American water heater sensor failure.
Drain about 4 to 5 gallons of water out of the drain valve at the bottom of the water heater and throw it out.
Example tank is a john wood 40 gallo.
Look up the manufacturer s chart for sensor resistance at various temperatures and figure out what your resistance.
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Check with gas utility company.
Common problems and how to fix them.
Now drain 1 gallon of water from the bottom of the tank as quickly as you can and get an accurate temperature reading.
Sediment or lime in tank.
Is your water heater showing a flammable vapor sensor code.
If you get this code and have lukewarm water and the pilot is still on try turning up the temperature.
Order replacement parts for american water heaters.
If you can t fix the problem notify a water heater service organization.
7 replace gas valve overall failure of the gas valve and will usually require replacement.
To reduce the risk of property damage serious injury or death read and follow all labels on the water heater and the safety instructions in the printed owner s manual.
American water heaters troubleshooting guides.
Thermostat set too low.
When a down draft is created the combustion products from the water heater can no longer exit up through the vent system.
The flame inside the water heater will become lazy and wander around causing the temperature sensor inside the thermocouple to trip.
Selecting your water heater repair or replace.
Selecting your water heater repair or replace.
Possible cause s corrective action.
Internal sensor failure the information on this web site is supplemental to the printed instructions that came with your water heater.
Water heater too small.
Luckily that error code can easily be reset and you will have hot water again in less then an hou.
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