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Discussion Starter · #1 ·
Hey Guys, so a couple of weeks ago my gas powered Rheem water heater stopped working. Gave the code was for the pressure switch (3 lights blinking).

I purchased a new pressure switch from Rheem and still the same issue after I installed it.

It will work for a few days and then stop. If I disconnect the power cord and plug it back it will for again for a couple of days. :sad:

There are no blockages or obstructions anywhere.
 

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Being that this is a DIY forum I'd suggest you get a digital manometer like the one below. No idea if this particular one is any good but you get the idea. Check the differential pressure that the switch is seeing and compare to the spec which should tell you if it is the switch or maybe the blower (assuming no blockages). Even if it doesn't give you a definitive answer you'd maybe have more confidence in what a tech tells you.

Also, I don't know about your water heater but furnaces often have flexible tubes that connect up to the pressure switches on inducer fans and those can get clogged and cause this kind of fail. Usually easy and quick to blow them out. Take a look at yours and see if that might be a problem.

https://www.amazon.com/dp/B07CWQJD6...jdCZkb05vdExvZ0NsaWNrPXRydWU=#customerReviews
 
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