Question about Rinnai Webstone The isolator EXP tankless water heater Service Valves WRIK

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Rinnai Tankless won't stay on

Rinnai R94LSi that goes out when tap is opened more that a little or more that one is opened. Error code 12 shows up. Has 1" pipe to within 3 ft and full 3/4" flex to unit??? Vent is less than 3 ft long and only rises less than 1 ft.\r\nJerry

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How far is the tankless from the gas meter? error code 12 means it doesn't have enough gas running to it. is the 3/4 flex true 3/4 or is it 1/2 with 3/4 threads. have you checked your BTU load on your house to make sure your 1'' pipe can handle everything else you have on the house? sounds like to me you dont have the right amount of gas to the unit.

Posted on Oct 03, 2009

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Posted on Jan 02, 2017

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I have a Rinnai tankless gas water heater and this things beeping and flashing 12 everytime we turn on the hot water the water will get hot but you have to wait for it to stop beeping


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Try turning the hot tap on very slowly till till the control shows burner is lit. Then turn it on faster. If it stays going with no error, you might have a faulty regulator, not opening fast enough to meet demand. Especially common with lpg models,a lot rarer on natural gas.

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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.

http://www.foreverhotwater.com/service-codes.php

Dec 31, 2008 | Rinnai Webstone The isolator EXP tankless...

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