Last one I replaced was less than $10 at home depot, it is held in with only a screw or two, and less than an hour of work, including the beer after fixing my friends water heater. Starting today, the unit is turning off mid-shower for no apparent reason. It has a electric igniter that is working. Description: The recall involves Rinnai EnergySaver™ Direct Vent Wall Furnaces, Models RHFE 431 and RHFE 556. They are either natural gas or LP gas (propane) fueled. We've taken multiple loooong showers over the last month without issues. I've got a Rinnai tankless water heater that keeps tripping offline. Gas furnace keeps shutting off...driving me nuts. Not only that, it may be signalling a bigger problem that you need to take care of. After it turns off, I'm able to turn it back on again pretty much right away (well as soon as I notice that it's gone out), but it's really annoying to have to keep an eye on it.. is there anything that could be the cause? And how severe is the problem? Everything ran fine (just like our old QuietSide did) right up until today. We’ll dive into a list of reasons why a tankless water heater may unexpectedly shut off. Is there any simple troubleshooting for this problem? Bad thermocouple - it is supposed to sense the presence of a flame, and turn off the gas if it is on, but nothing is getting hot. Open all the hot water taps. Some of those problems create situations where hot water unexpectedly shuts off. So don’t just sit there and shiver. Contractor's Assistant: How long has this been going on? Normally, your gas furnace should cycle on and off 3-8 times hourly, maintaining a comfortable temperature in your home. Shut off the cold water to the heater. Incidents/Injuries: Rinnai has received 11 reports of carbon monoxide leaking from the furnace. I have a gas furnace that is about 18 years old. The popoff valve was pouring water on the ground like it was a garden hose. It's been going on for about a day now. When they’re not, they will eventually develop problems. But a furnace that keeps shutting off every minute or two won’t heat your house properly. ... Use the following articles to get help on how to troubleshoot problems on Rinnai, AO Smith, Noritz and American. I turned off … First, it is important to realize that a furnace which is “short-cycling,” as we call it in the business, probably means that its safety features are working properly, so breathe a sigh of relief. If your furnace keeps turning on and off repeatedly, it can be stressful at best, and cold or downright uncomfortable at worst. All of the sudden yesterday, I noticed a big puddle in the yard. At the moment, the whole front of the heater has been taken off, so there isn't an issue with air flow through the vents. I reset the on/off switch and after about two minutes, the water gets cold. Insurance company paid for a replacement, and we had a Rinnai RUC98i installed about a month ago. But for now, let’s look at two major installation and maintenance causes for the off-and-on hot water phenomena. Rinnai Tankless Water Heater Troubleshooting Manual WARNING There are a number of live tests that are required when fault finding this product. Good morning. If after 10 minutes or so, there is still a flow of water you have a problem with the crossover. It works fine most of the time. The flame sensor is also working and was recently cleaned. I have a rinnai tankless outdoor gas unit (the big 9.4 gpm one) anyway, it's been installed about 2 years now with no real problems. I also just replaced the batteries in the thermostat...twice. Extreme care should be used at all times to avoid contact with energized components inside the furnace. No injuries have been reported. Sit there and shiver number of live tests that are required when fault finding this product me nuts noticed! Installed about a month ago to get help on How to troubleshoot problems on,! 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