Question about Water Heaters
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Posted on Jan 02, 2017
12 - Flame Failure or Poor Ground
1. Immediate code 12 is usually a defective gas valve, power supply problem, or defective fan motor wiring harness.
2. If code 12 occurs after a few seconds it indicates that proper operation was established, but then stopped unexpectedly.
3. Verify that fuel is being supplied to the unit.
4. Check for proper electrical ground. Unit must use a grounded power supply.
5. Check for flue blockage on inlet or exhaust.
Posted on Dec 31, 2008
Its A Possibility The Left Over Water In The Hot Is Frozen. If Your Line Is Exposed Outside Somewhere It Can Easily Freeze Up. Turn On The Hot Water Everywhere In The House And If Accessible Check The Lines To See Where The Warmth Ends. You Can Leave One Off Over Night In Hopes That It Will Eventually Defrost.
Posted on Jan 16, 2009
FA - Gas leakage error, gas valve circuit not closing properly
Posted on Mar 15, 2009
SOURCE: Rinnai tankless water heater
LC is the error code that you get when you have limescale buildup in the heat exchanger. You need to flush your heat exchanger. If you have the manual for your water heater, use it. The manual to mine is attached. The procedure for flushing it is covered on page 12. I suggest that you have a certified Rinnai plumber perform this task as it requires a ciruclating pump and some hoses that you need to connect to your water heater. If you don't perform this task, it is possible that you will need to replace your heat exchanger and this is not something covered by Rinnai's warranty.
Posted on Sep 22, 2009
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