Question about Bosch & Tankless LP Hot Water Heater

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Our Bosch tankless hot water heater keeps shutting off. We have been having to reset it more and more. And now it shows 130 on it, but the water comes out cold.

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Have a Bosch Service Provider inspect the installation. You can locate one at boschhotwater.com or Protankless.com. It sounds like a very poor installation with poor combustion air and poor gas piping.

Posted on Jul 27, 2010

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Posted on Jan 02, 2017

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1) If tankless is not showing error code, the problem might be single-handled faucet cartridge:
http://waterheatertimer.org/Crossover.html
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

2) Catch up on maintenance, such as cleaning combustion parts, have gas pressure checked, etc.

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Water heater keeps shutting off


1) Product unknown,. Copy following link:
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html#ECO

2) Add comment with brand and type water heater if more help needed. Jan 2013

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Jan 25, 2013 | Bosch & Tankless LP Hot Water Heater

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Tankless Water Heater


Yes you need to delime tankless each year.
http://waterheatertimer.org/pdf/Bosch_Descaling-heat-exchanger.pdf
http://waterheatertimer.org/pdf/Rheem-De-lime-tankless.pdf

Contact Bosch for exact repair information. My records show following number for tankless gas: 800-642-3111
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Sep 20, 2012 | Bosch Water Heaters

1 Answer

Bosch 10p, the pilot light went out, when reigniting i pressed the shut off button, now it is locked in and i cant release it, is there a reset button somewhere? regards


Bosch Phone Support:
Gas Products Technical Support: 800-642-3111
Electric Product Technical Support: 866-330-2729

For Bosch tankless troubleshoot resources:
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html
For Rheem tankless resources:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Add a comment with your experience so others with same-similar problem can benefit.

Also take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

Mar 28, 2011 | Bosch & Tankless LP Hot Water Heater

1 Answer

My Bosch tankless hot water heater keeps turning off and I have to go out and reset it often. I go outside and the screen is flashing A30...I reset it and it works for a while and then it goes out again. ...


Open following link for Bosch tankless troubleshooting resources, including Bosch contact number and link for finding service technician, etc.
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

Read manual cover to cover, make sure tankless receives yearly maintenance as outline in manual.

Add a comment with your experience so others with same-similar problem can benefit.

Also take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

Feb 14, 2011 | Bosch & Tankless LP Hot Water Heater

1 Answer

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Look for a water temp control on unit. Otherwise a lower temp can be attained by having a higher water flow to minimize temperature buildup in heating coil.

Sep 06, 2017 | Bosch & Tankless LP Hot Water Heater

1 Answer

My paloma tankless water heater will shut off in the middle of a shower


I am not sure if this is it but I had mine at too high of a temperature therefore I was not using enough volume of hot water to keep the heater on. They have a minimum amount of flowrate to sustain. Try turning the water temp down to 125-130. Hope this helps

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Hi Ken Tankless Water Heaters typically heat to a 80 deg temp. rise. Per a set time it takes the water to pass through the heat exchanger. Matter of seconds So at 130 deg F. Your heater is working fine. Did you take a heat measurement or are you looking at the set points inside the cabinet? To get the 130 deg F you need to upgrade the sensor available from your Bosch Dealer. Typical output water temperature would be 110. There are scalding issues over this set point. As long as you have 3/4 id pipe in and out and have insulation on the discharge side of the heater at all exposed points of the pipe. Your system was likly installed properly. Look it is only my opinion but Bosch it the best you can get in Tankless heaters. As for the dishes. Use the sanitize setting on the dishwasher or alittle extra bleach in the dishwater. And don't forget to rince with fresh water only. For the shower or tub. Use less cold water in the mix. Tankless water heaters were designed to use less resorces aswell as energy. And I want to thank you for that.

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