Question about Terminator Aquastar 125FX Tankless Water Heater: FX Hood Horizontal Vent

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Tankless water heater

Nothing will get this heater to come on - continue to get er code

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What error code do you get? I listed the Bosh telephone number below. They should be able to walk through it with you and diagnose it. Be prepared for long hold times though. I also listed the web site. There you can download the manuals and such. Good luck.

1-800-642-3111
http://www.boschhotwater.com/

Posted on Jun 17, 2008

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HI, I have a Bosch tankless water heater with electronic ignition and no pilot light. The heater will work great for a week or so then it will cut off for no reason and flash P2 in the readout. If I...


Actually E2 means the water is too cold. P2 is a computer program setting.

Check the connection of the temp sensor itself, maybe its broke on the inside if a new temp sensor didnt fix the problem.

Oct 03, 2008 | Terminator Aquastar 125FX Tankless Water...

1 Answer

Bosch Tankless HW Heater...Hot water flow becomes cold then hot again during shower. Have had only Bosch plumber in area out numberous times but never fixes the problem.


You are using a low flow shower head. you probably own the 250/2400 they have activation rate of .8gpm. If your shower head is low like this, your unit will deactivate. Higher flow shower head is a fix, or pull the aerator out of the shower head you have now might help.

Sep 23, 2008 | Terminator Aquastar 125FX Tankless Water...

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The unit continually gets at E2 error code. I have replaced the sensor twice and it still occurs. Can you give me a solution or point me to a repair person somewhere near Zip 64856?


If this is a outdoor unit, and the temp gets below 36F this will always happen, unfortunatley. check the connection of the E2 temp sensor. Maybe its broke inside.

Jul 28, 2008 | Terminator Aquastar 125FX Tankless Water...

1 Answer

Pilot light keeps going out


Your pilot light keeps going out on what. Please be descriptive. (i.e. brand, size, model #, etc.)

Jul 27, 2008 | Terminator Aquastar 125FX Tankless Water...

1 Answer

Hi, We have one of your tankless hot water heaters. At about this time of the year in southern CA it is difficult to take a shower. We run either really hot or really cold. Is this due to the water tanks...


Your water in southern california is very hot during the summer months. I would try pulling the aerators out of the sinks and shower heads and also pull the inlet screen out of the watervalve connection on the heater itself

Jul 17, 2008 | Terminator Aquastar 125FX Tankless Water...

1 Answer

Gradual decrease in water temperature


Rebuild the watervalve or replace it. 6 year old unit means its probably one of the 125 series. Probably a polymer gray water valve. Pay attention to the venturi, most likely its very dirty. You can get instructions off the www.boschhotwater.com websight to rebuild this.

Feb 20, 2008 | Terminator Aquastar 125FX Tankless Water...

1 Answer

Load beeping


I'm not sure what water cooling system you speak of. This is a propane water heater. Possible issues: pressure regulator making noise. Could be dirty or defective. Air in a water line. Excessive scale caused by hard water.

Nov 25, 2007 | Terminator Aquastar 125FX Tankless Water...

5 Answers

BOSCH AQ125FX TANKLESS WATER HEATER


these heaters work when a pressure drop is sensed in the water supply line. The pressure sensor is likely blocked with sediment from the city supply. You may want to call for service.

Apr 27, 2007 | Terminator Aquastar 125FX Tankless Water...

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