Question about Rinnai Heating & Cooling
We have a REH 181 UCH
and it has been making a strange noise coming from the main flame source. Sounds like a windy day! After a while the flame cuts out altogether and the heater switches itself off.
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Posted on Jan 02, 2017
SOURCE: Heater goes off
Possibly A bad thermocoupler. It is the part that looks like a stiff solid copper wire with on end sticking in the flame of the pilot light and is a safety feature if the pilot goes out it starts to cool and the resistance changes back you the module and the module shuts the gas off. I have seen these go intermediately faulty in waterheaters and do just what you described.
Posted on Jan 08, 2007
will either be the unitrol control box or the thermocouple, when you push down you are holding two magnets together and waiting for a small charge to be created from the probe in the flame , if this is not working you have no charge and the magnets won;t stick to allow the valve to open, change the thermo and see if that works first, its way cheaper than a new controler
Posted on Feb 05, 2009
This sounds like a bad heat exchanger. It is possible that you do not see the crack because the crack is closed when the heat exchanger is cold (or room temp). Allow the furnace to heat up, this will allow the expansion of the crack. Turn the power off and examine the heat exchanger while it is still hot.
Posted on Apr 10, 2009
Check for 24 volts across the two terminals on the gas valve when the ignitor glows. If yes, bad gas valve or blockage in the gas train. If no, bad ignitor or circuit board. Even if the ignitor glows, it still may be bad and not sending the proper signal to the board. If you jump the R and G terminals on the circuit board, does the fan still only run for 90 seconds? If so I would say replace the board.
Posted on Dec 28, 2009
Looks like an older system. Tighten all of your electrical connections. Inspect all of the low voltage wiring for any insulation cracks or other damage. The problem you describe sounds like something is either "shorting" or breaking down electrically. Unless the technician can catch it while he/she is there, it will be difficult to determine exactly what is happening. You might get lucky and resolve it yourself by tightening all electrical connections and reinsulating (use electrical tape) any damaged low voltage wire connections. If you continue to experience problems, get the tech. Hopefully the last company you used will be willing to work with you on the bill considering they were unable to "catch" it during the last visit.
Without being there with toolbox in hand, I hope you find this information very helpful moving forward. :-)
Posted on Mar 19, 2010
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