Question about Rheem RTG-74PVN-2 Natural Gas Pronto Whole House, Natural Gas, Tankless Wat
Rheem rtg-74pvn-2 tankless water heater--I keep getting getting Error code 13 (air flow). Sometimes the hot water stays on for a few days sometimes for 3 minutes. The water/well pressure is good and there is a water filter and softner on the system. The gas company says gas pressure is correct, gas line is correct size etc. The unit is about 9 months old, well vented outside (thru roof), and located in a hugh attic. I am going to check the wiring to the O2 sensor (how ?). Thanks Ann
Have 2 of these Rheem units in my house. Both had this same error code within 30 days of each other. And my neighbor has 2 units as well - and guess what - 2 months after mine stopped working because of the code - so did theirs. It is not something that can be fixed. It is a manufacturer's defect - and it looks like Rheem has yet another class action on their hands (like the one for the RTG - 74 PVN). They need to do a recall to repace these units.
Posted on May 08, 2010
I have the RTG-53DVN, it too is an overly sensitive peice of ****. It worked for about 2 years, then started throwing errors. Had a plumber come out to look at it. He spent a lot of time on the phone on hold with Rheem, then they finally just overnighted a new circuit board. Well, that worked for about 3 weeks and now I have a brand new error code. What a peice of dung. Save yourself the frustration and do not buy a rheem.
Posted on Oct 17, 2010
I have a 66 dvn.it would throw the code 13 after 2 to 3 minutes. I cleaned the burner to no avail. I kept the cover off to observe the burner through the small window. I noticed 2 things. The flame started as a nice blue flame but would then turn red before shutting down. That indicated a true lack of oxygen. However the unit was being feed plenty of fresh oxygen. This is most definitely an internal issue. Also I smelt natural gas from the unit. A possible leak? I choose to check the air flow from the fan through the hose to the regulator unit. Blew all lines out with air. Then opened the cover to the air and gas cambers. Here I noticed 3 o rings for the air and 2 gas cambers. These o rings totally compressed. I went to home depot and found number 12 o rings for faucets. They were thicker than the originals. Put the cover with the cork gasket back on. Be very careful that the new o rings do not fall off. Reassembled everything and started the hit water. No more code 13! The cheapest part in the unit was the weakest link. For 2 dollars I got 10 new o rings. I just want to add how useless rheem was. I called but the only recommendation was to get an expensive plumber. The o rings are not even shown in the parts and exploded drawings.
Posted on Dec 28, 2014
Error code 13 is actually Oxygen Depletion Sensor problem, or so the tech told me when I called. The unit needs some disassembly and cleaning (or replacing) the oxygen sensor.
They emailed me the procedure to disassemble and clean the unit. You should probably call the tech support to get this procedure if you are comfortable doing this work or get a tech to come out and do it for you.
Posted on Feb 05, 2010
I have a similar problem with the Rheem units. 1.5 years after installation the unit failed to heat water. After calling Rheem and them sending out a replacement circiut board and controller chip, the problem was not fixed. The original plumber (sent out by Rheem) left after concluding it was a venting issue (that was not an issue for 1.5 years) we called another plumber recomended by Rheem support. That plumber spent 5 hours working on the problem, on and off the phone with Rheem support and concluded that the venting was not the problem and that there was nothing he could do outside of replacing the whole thing. Moral of the story, don't purchase a Rheem water heater. They don't stand behind their product and we are now looking for an alternative source of hot water. Thank god it is near 100 degrees and a cold shower feels good.
Posted on Sep 03, 2010
I took out the flame sensors on my 64dvn and sanded them to remove oxidation and that was the cure.Called rheem to request new flame sensors under warranty and was told that now that it's working all they could do is sell them to me.Thanks for nothing rheem.
Posted on Apr 27, 2018
Having the same problem code 13...Rheem verified my plumber/installer of 95dvn hooked up the venting wrong. Rheem tech explaining that exhaust and intake must vent together according to the manual. In other words if your exhaust is vented outside diagonally and your intake vented horizontally maybe through roof - the sensor detects a variance and throws a code 13 ...The fix- My manual page 68 indicates a High-Altitude Dip Switch Adjustment - above altitude 3280 ft dip2 the 3rd switch turn on. above 6560 ft the 4th switch is on. My altitude is only about 800 ft so in normal operation all my dip switches should be off, however mine is working perfect on dip 4th switch to on. Aparently the adjustment compensated for plumbers install error. Alternatively should i get another code 13, amazon sells a Rheem Concentric vent kit sp20245, 42.00 which will be my next fix...Hope this helps!!!
Posted on Aug 07, 2015
Testimonial: "Thank you but Rheem replaced my unit and the vent stack at no charge back in 2010. That being said they were BIG BEHINDS about it and I would never buy a Rheem product again. Most people would have given up but the people in customer service kept me on hold for hours (no kidding) and even lied to me at times, it pis_ed me off. Bob123123 helped me a lot when he mentioned the class action lawsuit also. I was so mad, I just refused give up until they did something."
I have the RTG95DVN. We have had it just over 2 years. Last August, we had it serviced/ cleaned out. We then started getting the error code 13. Our Plumbing Company who installed the unit has been here 3x, and it still shuts down. Now every few minutes. They do not know what is going on. I have laid the ultimatum down; fix it, replace it, or take it out of here, and put a regular tank back in. Very frustrating because it ran great the first years and a half.
Posted on Feb 27, 2015
Same problem with my unit. After two years of problems, a new burner unit, a new computer board and countless repairs my loyal HVAC guy fought for me until I got a new unit. Now I have to fight for my installation charge. This new unit is a redesigned unit, RTG-95DVN. I guess they had too many problems with the 74PVN.
Posted on Sep 09, 2010
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