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

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Worcester - Bosch RD532 Red Signal receiver light constantly on and won't respond to control timer. Dunno if a failure or setting problem ?

Sounds like you're dealing with a pesky issue. It could be a technical glitch or just a setting hiccup. Have you tried resetting the timer or checking the settings? If that doesn't do the trick, it might be worth getting a professional to take a look.U can also check some info about alphamechanicals. They got my air conditioning installation in Orangevale, CA https://alphamechanicals.com/service-area/orangevale-hvac-service/ and as I know they has to know something about bosch devices
4/26/2024 3:33:16 AM • Bosch Water... • Answered on Apr 26, 2024
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My Bosch Highflow 25 EC hot water heater loses the pendant displays on cool to cold mornings , what could be causing this annoying fault ?

Losing pendant displays on cool to cold mornings with your Bosch Highflow 25 EC hot water heater could be caused by temperature-related issues affecting the display module. Cold temperatures can affect electronic components, causing them to malfunction. It's possible that there could be a loose connection, moisture buildup, or a fault in the display module itself. I'd recommend contacting Bosch customer support or a qualified technician to diagnose and fix the issue.
2/6/2024 9:19:50 PM • Bosch Water... • Answered on Feb 06, 2024
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Why is the Bosch high flow 21e system while showering going cool & then returns to the set temperature?

If your Bosch Highflow 21e hot water system is experiencing fluctuations in water temperature while showering, it could be caused by a few different factors. Here are some possible reasons for this issue:
  1. Flow rate too high: The hot water system may not be able to keep up with the demand if the showerhead or tap is allowing too much water to flow through. This can cause the water temperature to drop suddenly. Try reducing the flow rate by turning down the tap or using a low-flow showerhead.
  2. Water pressure fluctuations: If the water pressure in your home fluctuates, it can cause the hot water temperature to vary. This can be caused by various factors, such as other appliances using water at the same time, or changes in municipal water supply pressure. Installing a pressure regulator or a flow restrictor may help to stabilize water pressure.
  3. Blocked or dirty water filter: A clogged or dirty water filter in the hot water system can restrict water flow, causing the water temperature to fluctuate. Check the filter and clean or replace it if necessary.
  4. Malfunctioning thermostatic mixing valve: The thermostatic mixing valve (TMV) regulates the water temperature in the hot water system. If it's faulty or dirty, it can cause temperature fluctuations. A licensed plumber or technician can inspect the valve and replace it if necessary.
  5. Faulty temperature sensor or control board: If the temperature sensor or control board in the hot water system is faulty, it may not be able to maintain a consistent water temperature. A technician can diagnose the issue and repair or replace the faulty component.
If you're unsure about how to diagnose or fix the issue with your hot water system, it's best to contact a licensed plumber or technician for assistance.
3/9/2023 3:47:20 PM • Bosch Water... • Answered on Mar 09, 2023
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My old tankless naturMy gas water heater Bosch model JSRZ 5-T PG, it is not starting automatic it has magnetic sensor valve in water inlet

The Bosch JSRZ 5-T PG tankless gas water heater may not start automatically because of problems with the magnetic sensor valve, power supply, or control unit/thermostat. Possible troubleshooting steps are:
  • inspect the water inlet valve and replace if faulty
  • confirm that power to the unit is functioning
  • if the problem continues, seek professional repair service.
1/29/2023 11:17:51 AM • Bosch Water... • Answered on Jan 29, 2023
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No water coming out of hot water taps with a Bosch Water Wizard 10P?

Do you live in a climate where the hot water line could have frozen? If your heater did freeze up, that could be very bad. This is because water actually expands when it freezes and can do a lot of damage to pipes and to the water heater itself. My other thought is possibly a clogged in line water filter. But typically a clogged water filter would make it run with reduced pressure rather than a complete shutdown all water flow.
1/20/2023 6:10:26 AM • Bosch Water... • Answered on Jan 20, 2023
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Can you help with these Bosch 715 EFS GWH Error Codes? AF, 40, 07 -

https://www.fixya.com/support/t13643459-a2_af_error_codes
1/10/2023 7:22:20 PM • Bosch Water... • Answered on Jan 10, 2023
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I have a Bosch AquaStar Tankless Water Heater, GWH 1600P. I have had it close to 10 years with no problems but other day pilot light went out and I can not get it to light and stay lite.

It could be the thermostat sensor They usually have a carbon buildup. They are easy to install and not that expensive. Good luck
2/1/2022 2:43:02 AM • Bosch Water... • Answered on Feb 01, 2022
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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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