How to start up
SOURCE: A.O. Smith Water Heater Problems
ok here is how a heater works - there is a high setting cut out and a low settin cut out. The cycle is as follows. The water heater first heats to a preset temperature , say 120 degress. You draw water and the temp in the tank drops to say 90 degrees at which point it fires again- sensing that if it doesn't you will run out of water.I think that this setting has been set too low to say 75 degrees and you get cooler water because the heater cannot catch up. You must find this control in book at set the differential to twenty degress.This will stop you from running out of hot water.Just for the record less reputable companies will do this on purpose over a coulpe visits adn tell you the heater is failing and must be replaced. Get a book. In the mean time I need your model # so I can find this setting for you.Wait to hear from you. Allen
SOURCE: Draining the Priemer Plus Gas Hot Water Heater
Begin by turning off the gas at the tank and at the valve near the tank.
CAUTION: Do not proceed any further if you do not know how to relight the gas pilot!
2) Turn off the COLD water supply to the tank.
3) Attach a garden hose to the drain valve at the bottom of the tank. Run the hose to a convenient drain location. Be careful if you use a real cheapy garden hose... some of these become very soft when hot water runs through them, and may leak! If you don't have a drain in the basement floor or suitable sump hole, you have my sympathies... this drain-down can take a while with a bucket! Oh... and be careful if you use a soft plastic bucket. It can also soften from the heated water so don't overfill it or burn yourself!
4) Open up the hot water side of any faucet. Open up the drain valve on the tank and allow it to empty. Miller time. That is, unless you don't have a sump...
NOTE: If the drain valve clogs, turn on the cold water supply to the tank to use water pressure to "blast" through the clog.
5) When the tank is empty, shut off the drain valve and turn on the cold water. This will loosen up more sediment in the tank through the churning action of the cold water in the tank. Let the tank fill partially and drain it again. In fact, if you find that the sediment starts to clog the drain valve, turn on the cold water supply to the tank, which will help loosen the sediment and blast it out.
If you have extreme amounts of sediment, you may have to repeat this procedure a few more times. Look at the drain water... if it is running clear, you are done. Shut off the drain valve, open the cold water supply and allow the tank to fill. Once water comes out of the hot water faucet, the tank is full and your task is done! Now, you can turn the electricity or gas back on to heat the water.
How frequently to clean the sediment from your tank...
This depends on the source and purity of your water supply. Some pros recommend doing it annually, some every few years. I would recommend doing a partial drain down annually if you find any sediment in the tank, otherwise every couple of years.
Remember that with an electric water heater, you must turn the power off! Even a partial drain down may expose the upper heating element to the air and permanently damage it!
SOURCE: Eractic Power Vent Gas Water Heater
Th epproblem you are most likely have is from a safety called a flag switch usually located either in the blower or right past it. When you unplug and replug you reset the switch. Sequence of events.
1 fan comes on.
2 switch is made from the airflow of the fan.
3 ignitor come on
4. main gas valve opens and ignitor starts flame.
You are being stopped at step 2 when the fan does not move with the air. This shuts off and out the water heater from calling again. Find the fan switch and make sure it moves easily. They get dirty and also dry from lack of lube.
Good luck.
SOURCE: Rheem Gas Hot water Heater; Model 21130DV:
yes, sounds like the temp control is bad, you should be able to google model# and thermostat to find replacement. should be fairly easy to swap out
SOURCE: i have a richmond gas hot water heater model
lock out code....turn off unit for 1 minute (unplug) press both arrows and hold for 5-10 sec... then enter L R L L ... R L R R...that should reset it.
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