20 Most Recent Bosch Aquastar 125B Water Valve Assembly conversion kit - 8707002499 Questions & Answers

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Bosch AquaStar 125b suddenly goes cold

your not making sense with you question --state it goes cold in middle of shower --but state it will stay hot or cold forever ----if its the latter continued hot till you shut off water that normal working if the unit shuts down during shower then you have a problem ----unit is set at one temp and runs at that temp and you use shower 1 handle / 2 valve what ever you own to adjust temp their are really only 4 reasons stops making hot water ----2 are usually well water supply --incoming water pressure /flow or to cold ----other are gas valve -or sensor so i would look into your shower handles since almost all have adjustments and anti scold safety
9/28/2021 11:50:13 AM • Bosch Water... • Answered on Sep 28, 2021
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Our Bosch Optiflow GWH 20 wont light, controller. shows error E0. Any ideas how to rectify?

SEEMS LIKE CALLING A LOCAL PLUMBER IS BEST WAY
7/18/2021 10:59:44 AM • Bosch Water... • Answered on Jul 18, 2021
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I have a Bosch Aquastar GWH 2400 CTD EFS LP is there a conversion kit to convert it to NG?

most likely. contact a dealer for advice
6/14/2021 12:52:41 PM • Bosch Water... • Answered on Jun 14, 2021
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Aquastar 1600H. Why is there no spark?

check to see if voltage correct if not replace board if ok bad ignitor
2/14/2021 4:42:02 AM • Bosch Water... • Answered on Feb 14, 2021
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Bosch Tankless GWH 715 Powers on but does not ignite. Reset does not do anything. Diagnostics not working i.e., water flow 00 but water flowing. May be faulty control unit but how do I confirm?

WOW!!! Great answer by Steve (I know Steve Spam...real name Richard). Lot of time on his hands (37000 answers). Can we get real professionals answering questions. Thank you Richard...let's just call you Dick for short.
1/10/2021 5:26:47 AM • Bosch Water... • Answered on Jan 10, 2021
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My brand new Bosch 1200 will ignite the flame but then shoots off.

Are you holding the flame button until the thermocouple heats up.
10/7/2019 1:02:26 AM • Bosch Water... • Answered on Oct 07, 2019
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How do I drain the water from a Bosch W135-9 water heater?

you dont drain theses type water heaters
9/9/2019 12:48:16 PM • Bosch Water... • Answered on Sep 09, 2019
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How do I drain the water from a Bosch w135-9 water heater?

you can not drain these w/ heaters
9/8/2019 2:38:49 PM • Bosch Water... • Answered on Sep 08, 2019
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I HAVE A BOSCH GWH10-2 G HOT WATER BOILER. THERE IS GOOD WATER PRESSURE ON THE COLD TAP BUT WHEN IT COMES OUT THE SHOWER HEAD ITS VERY LOW PRESSURE. WHAT CAN I DO

first id check shower head most has a screen in them and do get clogged from time to time since the water flows good from faucets
9/8/2019 2:18:23 PM • Bosch Water... • Answered on Sep 08, 2019
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Hi I have a Bosch water heater w135 When I turn the hot water tap on the heater will flare up as it should But then after a minute the flame goes out again I was told it’s the glue temperature sensor that has gone but I’m not convinced Does anyone have any idea what it could be wrong please Anne

One possibility - insufficient gas flow or oxygen starvation might be making the pilot light dip when the main flame is on so the thermocouple bulb is no longer heated. This will cause the main flame to go out and restore full pressure/sufficient oxygen to the pilot.
9/5/2019 1:07:40 AM • Bosch Water... • Answered on Sep 05, 2019
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