Plumbing

Plumbing questions? Ask a plumber and get answers ASAP.

Ask an Expert,
Get an Answer ASAP!

My Bosch 250SX LP supplies only one bathroom with 2 sinks…

Customer Question
My Bosch 250SX LP supplies...
My Bosch 250SX LP supplies only one bathroom with 2 sinks and one shower with single handle control and anti-scald feature. Only one water source is ever used at one time, i.e. one shower or one sink only. If my single handled shower control is on all
the way to hot it produces hot water too hot to shower. If I adjust it to a point where the water is comfortable the demand water heater cycles on and off continuously causing water too cold than too hot for comfort. If I turn a sink hot water faucet on than
I can adjust the shower for the right temperature but I must keep the sink faucet running. I had a whole house water softener installed after flushing out the demand water heater. It is very unlikely the supply pipes are clogged partially or otherwise. I am
not a plumber but assume that a temperature sensor is defective or calcium deposits on some internal control or sensor may be causing the problem. Do you have a solution? Keep in mind that I can purchase relatively inexpensively a small demand water heater
since only one faucet or shower will be operating any one time.
Submitted: 2 years ago.Category: Plumbing
Show More
Show Less
Ask Your Own Plumbing Question
Answered in 18 minutes by:
6/1/2015
Plumber: Rick, Construction Supervisor replied 2 years ago
Rick
Rick, Construction Supervisor
Category: Plumbing
Satisfied Customers: 24,041
Experience: Licensed Master plumber with 40+ yrs. experience.
Verified
It sounds like you don't have enough flow to keep the unit firing when you mix the water at the shower. The first thing to try is to clean the intake screen on the cold water inlet on the heater.
Ask Your Own Plumbing Question
Customer reply replied 2 years ago
When your first reply came to me it was partially covered by a request from Marc which blocked me from responding to your answer. Marc's page looked like I was to respond to him since I could not respond to you. So I did. After responding to him and entering my payment information again your reply popped up and I am now replying to that.
Information I'm giving you I gave to Marc already but I will repeat it. I put a new filter on the cold water supply. I also purged the water heater as directed by Bosch procedure. I also installed a whole house water softener. I am not a plumber abut it seems to me that there may be a sensor, probably a temperature sensor of some sort that is defective. Perhaps a mineral buildup around an internal sensor which was not cleaned enough by my cleaning procedure. Some minerals may require actural scrubbing for example. I have seen the same symptoms on some other repair sites but never responded to those sites because none of the sites seemed to be able to solve the problem or even know what the problem was. It was a series of try this; try this than; etc. etc.
Jack
Plumber: Rick, Construction Supervisor replied 2 years ago
It sounds like you're describing a water flow issue like I outlined in my original answer. The inlet filter is only one possibility. The only way this is temp sensor related is if the temp readout on the unit doesn't conform to the actual water temp. Like I said in my original answer lowering the water temp is the first thing to try for this issue. If the temp is already below 120 and you still have the same problem then the temp sensor is a possible culprit.
Ask Your Own Plumbing Question
Customer reply replied 2 years ago
I replied to your last query incorrectly I believe. I don't think you received it so I will try to answer your last query.
I adjusted the water temp. from 122 degrees down to 106 degrees. No change. The water is either too hot or cycles on and off if I adjust it to a comfortable level. If I turn a hot water faucet on at the sink than I can adjust the shower at a comfortable temp. and take a full shower. Can you provide me with the location of any temp. sensor or similiar item on the water heater that I can replace and may solve the problem.
I have no problem replacing the whole unit since I only use one water supply at a time. I believe a unit in the range of 3.1 or so gallons per minute should suffice.
Units of this size are relatively inexpensive. A rinnae 3.1 gallons per minute is about $230.00 on line upt to about $500.00. I would appreciate your opinion on this. ThanksJack
Plumber: Rick, Construction Supervisor replied 2 years ago
I just checked this thread and it appears a large part of my original response has vanished. The fact that the unit functions properly when you increase the flow by turning on a sink tells me this is a flow problem not a temp problem. But too hot at 106 could be a temp sensor issue. You should be able to stand water at ~106 without mixing any cold. If you can get another heater for that kind of money and do the work yourself then it probably isn't worth fixing this unit if the fix is to replace the water valve (part item #14) which would be the likely culprit causing a flow problem. However replacing the sensor is a pretty easy and relatively inexpensive fix. Here is the install manual with parts on page 30 & 31http://www.bosch-climate.us/files/201109162028550.250SX_English.pdf
Ask Your Own Plumbing Question
Was this answer helpful?
Ask Rick Your Own Question
Rick
Rick
Rick, Construction Supervisor
Category: Plumbing
Satisfied Customers: 24,041
24,041 Satisfied Customers
Experience: Licensed Master plumber with 40+ yrs. experience.

Rick is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future.

JimmyBagley, IA

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

Marc

Marc

Plumber

1,127 satisfied customers

Plumbing heating & home maintenance contractor

Jerry

Jerry

Plumber

784 satisfied customers

over 20 years residential plumbing experience.

Theplumber717

Theplumber717

Plumber, Hvac Tech

656 satisfied customers

Lic Plumbing contractor, 28/yrs res,com,repair,Universal HVAC Tech

Phil

Phil

Mechanical Engineer.

610 satisfied customers

Retired mech. contractor, shop owner, 51 yrs experience.

Mario

Mario

Master Plumber

604 satisfied customers

Master Plumber, Fire Sprinkler, and Jobbing Spec.

Bud

Bud

Plumber

538 satisfied customers

22 Years Field Experience - 17 Years Business Ownership - Residential or Light Commercial

Rick Mather

Rick Mather

Building Inspector

498 satisfied customers

Assistant Building Official, HVAC Tech

< Previous | Next >

Related Plumbing Questions
My insikerator garbage disposal is leaking around the re-set
My insikerator garbage disposal is leaking around the re-set button at the bottom. Just a rubber washer ? Or is it more serious ? … read more
WCohn
WCohn
Journeyman Plumber
Journeyman License
1,573 satisfied customers
I have a rinai water heater and it is not working. There is
i have a rinai water heater and it is not working. There is no water from the hot taps. Checked that the cold water valve is on, gas is available, power is available, but no hot water flow. … read more
Matthew A
Matthew A
Owner Plumbing Company
Vocational, Technical or Trade School
3 satisfied customers
Can i use the same flu from a Rinnai energysaver 1001ft to
can i use the same flu from a Rinnai energysaver 1001ft to instal a Rinnai energysaver 1005ft … read more
WCohn
WCohn
Journeyman Plumber
Journeyman License
1,573 satisfied customers
My plumber just installed a i12 LP tankless water heater and
My plumber just installed a i12 LP tankless water heater and we are getting an error code of E5 … read more
canuck the pro
canuck the pro
253 satisfied customers
I have a Rheem tankless water heater. 3.5 years old. No hot
I have a Rheem tankless water heater. 3.5 years old. No hot water tonight. I checked the propane level that supplies it and it says 55% full. I have checked the breaker box in the house. What would yo… read more
canuck the pro
canuck the pro
253 satisfied customers
Looking for advise about swapping out the cast iron dwv
Looking for advise about swapping out the cast iron dwv system with ABS by splicing into an existing ABS line. … read more
WCohn
WCohn
Journeyman Plumber
Journeyman License
1,573 satisfied customers
I bought a toilet 8 years ago for the small bedroom bath.
I bought a toilet 8 years ago for the small bedroom bath. Just toilet and sink. Well we dont use it as much as th main toilet and over the years I am used to seeing water in the bowl when you use it. … read more
WCohn
WCohn
Journeyman Plumber
Journeyman License
1,573 satisfied customers
When we flush the toilet in our upstairs bathroom, we get a
When we flush the toilet in our upstairs bathroom, we get a loud gurgling noise in the drain line of the bathtub which is next to the toilet. After we use the shower/tub, we do not get any noise for t… read more
Rick
Rick
Construction Supervisor
24,041 satisfied customers
I have a new water heater installed and have elec. power to
I have a new water heater installed and have elec. power to the elec. water heater and it is still not heating water. Did not turn power on until full … read more
Daniel Plourde
Daniel Plourde
plumbing, hvac technichian
Vocational, Technical or Trade School
452 satisfied customers
My Moen 1/2 garbage disposal is jammed. An hour. I have
i tried looking at the bottom but don't see where to stick an Allen wrench.… read more
canuck the pro
canuck the pro
253 satisfied customers
How much would it cost to replace sewer lines in a house
How much would it cost to replace sewer lines in a house that is 50 years old. The lines are cast iron and I want them replaced with PVC. … read more
Rick
Rick
Construction Supervisor
24,041 satisfied customers
I installed the Koehler Katun 8 bathroom faucets and the hot
I installed the Koehler Katun 8 bathroom faucets and the hot water does not work in any of them. Do you know what the issue could be? … read more
canuck the pro
canuck the pro
253 satisfied customers
We're not sure if our hot water heater is on... Just opened
We're not sure if our hot water heater is on... Just opened up a seasonal home and the usual plumber has passed away. Can you walk us through a check list of things to check to see if we've done it co… read more
Rick
Rick
Construction Supervisor
24,041 satisfied customers
Can a pvc compression coupling be used to join black plastic
Can a pvc compression coupling be used to join black plastic pipe from well to house? … read more
Rick
Rick
Construction Supervisor
24,041 satisfied customers
I just piped in a hot water heater with 3/4 in galvanized. I
Hi, I just piped in a hot water heater with 3/4 in galvanized. I have good water pressure on the cold side but, no hot water pressure at all from the kitchen and bathroom faucets. I've done at least a… read more
Rick
Rick
Construction Supervisor
24,041 satisfied customers
I have three waters pickets outside my house. One will not
I have three waters pickets outside my house.One will not turn in either direction. I am afraid to force it. My brother thinks I should get a wrench and try to force it to turn on.The second on turns … read more
Rick
Rick
Construction Supervisor
24,041 satisfied customers
I have a Moen kitchen faucet where the sprayer diverter is
I have a Moen kitchen faucet where the sprayer diverter is in the faucet, and the single handle is separate. The sprayer pulses, doesn't shut off completely, and water leaks from around the faucet its… read more
WCohn
WCohn
Journeyman Plumber
Journeyman License
1,573 satisfied customers
Wondeering why I can let air out of my Well Trol tank but it
Wondeering why I can let air out of my Well Trol tank but it won't accept air into the Schreder valve. … read more
WCohn
WCohn
Journeyman Plumber
Journeyman License
1,573 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x