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Takagi Water Heater Repairs
Takagi Water Heater Repairs

Takagi Water Heater Repairs

If you're looking for help fixing your Takagi Water Heater, look no further! Our comprehensive Takagi Water Heater repair guide will explain common issues, provide tips, and maybe show you how to repair your appliance.

For the home, kitchen and beyond, Takagi manufactures appliances that homeowners have come to trust. Even a trustworthy appliance requires occasional maintenance or repair, however. If you’re in need of Takagi appliance repair from experienced professionals, your local Appliance Helper can help.

Improper Venting 
Never use standard B-vent, which quickly destroys the heat exchanger because of acidic condensation. Always use sealed stainless steel vent pipe approved for all Takagi non-condensing tankless water heaters. Improper venting causes risky exhaust gas leaks. 

Gas Supply Line Problem 
It’s risky to hook up to an existing gas line (normally 1/2 inch diameter). Take note of the gas line requirements as described in the manual. The correct way is sizing for the maximum BTU per hour rating. 

Improper Gas 
The gas and the Takagi tankless water heater must be compatible to each other. Check whether the heater requires natural gas or liquid propane. Buy the heater appropriate for the type of gas supply you have. 

Temperature/Water Fluctuations 
Check input filter for debris and obstruction in case of low flow from the heater. Clean or replace the filter as needed. Before removing the filter, turn off the cold supply and relieve the hot pressure. In case of insufficient hot water or temperature variations, check the connection between the hot and cold supply of the Takagi tankless water heater. Shut the cold supply and open the relief pressure valve or any hot water faucet. If the hot supply output is steady after the pipe has drained, there is a cross flow problem. Let a plumber fix it. Also, reduce hot water consumption or avoid having too many hote water applications at the same time. 

Hard Water Problems 
Treat the water with softener or de-scaling device when it has high levels of calcium and magnesium. Never use reverse osmosis, which damages the heat exchanger. 

Dirty Combustion Air 
When available combustion air is full of particulate matter enter into the heater, install a direct vent model or kit. Takagi tankless water heater with indirect vent is not ideal in places with polluted air. 

No Ignition 
Provide proper gas pressure to the Takagi tankless water heater. Ensure that the unit is properly grounded and check the fuses. Wiring harness and igniter must be operational. See if the gas valve opens and the flow switch works. Burners must be properly installed and seated. De-clog inlet filter, as well as faucet aerators and shower head. 

Frozen Heater 
Supply electricity and gas to activate freeze protection during winter to prevent the heater from freezing and the heat exchanger from bursting. It also helps to install the auto drain down solenoid valves. 

Preventive Measures 
It’s a trouble to have a faulty Takagi tankless water heater, particularly when you’re in dire need of hot water. To keep your water heater in top condition, observe regular annual inspection and periodic maintenance. 
- Clean burner, control compartments, filters, and air passages. 
- Check the venting system. The vent exhaust must be free of snow and ice. 
- Observe visual inspection of flame, which should be clean, blue, stable flame evenly distributed on the burner. 
- Flush heat exchanger with de-scaling or water softener. 
- Keep fan and motor clean and free of dirt.



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Product Reviews:

I've had this sitting in the garage waiting for me to install it for 8
I've had this sitting in the garage waiting for me to install it for 8 months now. Our current 50 gallon tank was only 3 years old so I wasn't in any hurry. I relocated where the heater was installed a few feet and tore down the old closet in the garage the tank was in so just for that reason going tankless is a good thing. Now I have a lot more garage space. I'm a plumber by trade but not really in the industry any longer so I had installed hundreds of tank type heaters in my life. We were always of the belief that these tankless instant type heaters were a joke. That might have been true several years ago but they've come a long way since. The install was a little tedious. If you aren't moving your location then it will be a lot easier. You will almost certainly need to upsize your gas piping though. Most tanks use 1/2" gas piping and you can't run 1/2" very far if you intend to get the 200K BTUs these units require. I only had a 10' run of 1/2" but I didn't want to take a chance so I upsized to 3/4". Other than just the labor involved the install is relatively straight forward, not much unlike a tank heater install. I could not get used to the idea of using PVC pipe for a vent but, after firing the unit for the first time I'm almost surprised it needs any vent. No heated air comes out of this thing, it's like it's 100% efficient. I fired my unit initially with only a 3 foot section of PVC stuck through the ceiling and I crawled into the attic just to gauge the temperature of the exhaust gas. Well, there was none. I assumed the unit wasn't heating but it was. 125 degree water right at the tap and virtually no hot gas exhausting out the vent. Quite impressive! And the thing is almost dead silent when it runs. Time will tell if it's as good as it started off but so far I have no regrets. The first shower I took with it last night after working all day on sure was nice, and plenty warm. I will miss my water circulation pump though, with our tank heater we were able to have instant hot water right at the faucet. The pump we have now is not usable with this tankless heater and I'm certain what options are available for that. Having to run water for a couple of minutes sort of seems like a waste to me, I guess water is cheaper than gas but still.
Published: February 8, 2015
M. Gentry
Source: amazon.com

Very good product! We are very happy with our new tankless water heater.
Very good product! We are very happy with our new tankless water heater.
Published: August 18, 2019
Lisette C.
Source: amazon.com

I installed this unit a couple of weeks ago, and it's been working lik
I installed this unit a couple of weeks ago, and it's been working like a charm. It was pretty easy to install, but I'm a pretty handy guy, so I don't know how easy it would be for a regular joe. Its flow rate of 10gpm assumes you're not heating the water to 131 degrees, which I am. The higher the temperature set point, the less throughput because it takes longer to get the water up to temperature. I originally installed a Takagi T-KJr2-IN-NG Indoor Tankless Water Heater, Natural Gas , with a rated GPM of 6, but the flow was so low at 131 degrees (2.9) that it took almost 20 minutes to fill the tub for a bath. This unit, even at 131 degrees, has a flow rate undistinguishable from the 50-gallon tank water heater it replaced. Of course, it cost twice as much as the T-KJr2, so that makes sense. This is a condensing unit, which means it puts out water that must be drained appropriately. If you don't have a drain nearby, that's going to be a problem. The condensate is because this unit improves efficiency with a secondary heat exchanger, which extracts what otherwise would be waste heat exiting up the flu. Instead those hot gasses are used to help heat the water, and the much cooler gas is then vented up the flu. This cooling of the gasses causes water to condense out of those gasses; thus the need for a drain tube. How much heat does this save? Well, the vent for the T-KJr2 was too hot to touch when the unit was in operation; with this unit the vent is barely warm to the touch. In fact, instead of having to use double-walled stainless steel venting, I was able to use 3" PVC tubing. If you have very hard water, don't expect a trouble-free existence with any tankless unit. They are very sensitive to scale buildup (as is any water heater, but tankless units particularly so). My house is equipped with a Culligan whole-house water softener, but in the interest of overkill, I installed two filters ( DuPont WFPF13003B Universal Whole House 15,000-Gallon Water Filtration System ) upstream of the water softener. So before the water gets to the water heater, it passes through a sediment filter, a carbon filter, and then a water softener. According to my HVAC guy, this will greatly extend the life of the water heater. (The two filters also means I can now drink water right out of the tap, anywhere in the house, without that nasty chlorine taste.) In short, I highly recommend this unit. Plus, it looks really cool!
Published: February 19, 2016
Wordwrkr
Source: amazon.com

1st off, I LOVE this Tankless Water Heater. I honestly could not be more sa
1st off, I LOVE this Tankless Water Heater. I honestly could not be more satisfied. I have had zero issues or concerns. Any problem or complaint anyone has posted has not been an issue for me. It has been and is working flawlessly. It has been in service for about 4 months now. Installation is paramount. Have it done professionally by someone that has installed them before. Like my headline says "Do your due diligence researching what you need for installation." Should any problem arise I will update this review. Yes, I would absolutely buy this again.
Published: September 26, 2020
Jeff C.
Source: amazon.com

Purchased last summer when my tank water heater gave up the ghost. I waited
Purchased last summer when my tank water heater gave up the ghost. I waited until December to rate it because I wanted to see how it preformed under winter conditions. My home is in the Colorado Rockies at an altitude of nearly 8000 feet and the water incoming into my house 34 degrees. This water heater has preformed flawlessly under those challenging conditions.
Published: December 19, 2016
Stefan T. Jenny
Source: amazon.com

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