Plumbing

Plumbing Questions? Ask a Plumber and Get Answers ASAP.

Ask an Expert,
Get an Answer ASAP!

Plumbing

The water temp when on 115 degrees fluctuates widely when…

Customer Question
The water temp when...

The water temp when on 115 degrees fluctuates widely when taking a shower, from getting hotter to rapidly cooling off. I'm guessing a 20 degree swing? Any way to resolve or identify the problem?

Contractor's Assistant: How long has this been going on? And how severe is the problem?

Started probably a month ago. Only happens when using the shower; stays consistent when washing dishes.

Contractor's Assistant: Do you plan on doing the work yourself?

If possible. I can call the plumber that did the install...

Contractor's Assistant: Anything else we should know to help you best?

Don't believe so. Really like the unit; had it for over 3 years now.

Submitted: 2 months ago.Category: Plumbing
Show More
Show Less
Ask Your Own Plumbing Question
Answered in 3 minutes by:
12/21/2017
Plumber: Phil, Mechanical Engineer. replied 2 months ago
Phil
Phil, Mechanical Engineer.
Category: Plumbing
Satisfied Customers: 9,200
Experience: Retired mech. contractor, shop owner, 51 yrs experience.
Verified

Hello, if you have a tankless water heater the cause is low hot water flow, so the flow switch inside the water heater turns the burners off and on, causing the problem.

IF you have a tank type water heater, the problem is caused by a faulty shower temperature control valve, or a bad mixing valve if you have one out by the water heater.

Let me know the brand and model number of the water heater please.

.

My goal is to give you the best experience possible! I hope I have earned a 5 star rating! Please remember to rate my service by selecting the 5 stars at the top of the screen before you leave today. If you need more assistance, please use the reply box and let me know.

Ask Your Own Plumbing Question
Ask Phil Your Own Question
Phil
Phil
Phil, Mechanical Engineer.
Category: Plumbing
Satisfied Customers: 9,200
9,200 Satisfied Customers
Experience: Retired mech. contractor, shop owner, 51 yrs experience.

Phil 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.

9,200 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
I want to install a shower mixing valve on one wall and
I want to install a shower mixing valve on one wall and mount the shower head on the adjacent all to the right. what is your advice and are there any adherent problems in doing this? … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I have a kohler k680 mixing valve. The shower it controls
I have a kohler k680 mixing valve. The shower it controls runs at the correct temperature for about 5 minutes then it goes to 100% COLD … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
Rick, I have a hansgrohe thermostatic mixing valve 13373
Hi Rick, I have a hansgrohe thermostatic mixing valve 13373 that just quit letting water flow. Turn on the valve and no water at all. I am trying to find the cause. … read more
WCohn
WCohn
Journeyman Plumber
Journeyman License
1,437 satisfied customers
Replaced upper thermostat and upper and lower elements no
Replaced upper thermostat and upper and lower elements no hot water check power to t-stat 240 volts. … read more
WCohn
WCohn
Journeyman Plumber
Journeyman License
1,437 satisfied customers
How do I replace a Kohler 78913 cartridge for a Kohler
How do I replace a Kohler 78913 cartridge for a Kohler Master Shower Mixing Valve (K-400)? Does it screw in all the way until it stops? … read more
Brian Weeks
Brian Weeks
77 satisfied customers
My restroom sinks are not pouring hot water only lukewarm
My restroom sinks are not pouring hot water only lukewarm water. What could be the problem?… read more
Brian Weeks
Brian Weeks
77 satisfied customers
I am trying to replace the cartridge in a Grohe thermostatic
I am trying to replace the cartridge in a Grohe thermostatic shower mixing valve that was installed in 2002. I have unscrewed the green cap that you use to adjust the temperature, but am not figuring … read more
David Bowden
David Bowden
Owner
575 satisfied customers
My hot and cold water are now reversed in the shower after
Hi,my hot and cold water are now reversed in the shower after installing a new cartridge and mixer cap. I've read that I should rotate the mixer cap 180 degrees, but that doesn't make sense as the han… read more
Brian Weeks
Brian Weeks
77 satisfied customers
I'm looking for a map of how a kohler k-728 transfer valve
I'm looking for a map of how a kohler k-728 transfer valve and a k-8304 should look. We had a plumber install them and he said we need a diverter spout, but kohler says no. They say the transfer valve… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I was asking you the questions last week about the mixing
Hello,I was asking you the questions last week about the mixing valve.By trap you mean drop down 6 inches below coil? Just wanted to verify we can't simply drop down the existing piping 6 inches below… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I had a friend add a cash acme mixing valve. I bought a
Hello,I had a friend add a cash acme mixing valve.I bought a southwire infrared thermometer. To test temps.I'm having a lot of difficulty getting a safe but comfortable temperature in a two bathroom r… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I recently had a new boiler put in. The water in the kitchen
Hello, I recently had a new boiler put in. The water in the kitchen and bathroom sinks become scolding hot. I am able to deal with this with an anti scald devices in the shower faucets. Is there a dev… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I get hot water running out the cold tap for 30 seconds and
i get hot water running out the cold tap for 30 seconds and then hot water comes out . This happens to all my faucets in the home. I heard that it could be a mixer valve issue. … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I need to replace the thermostatic mixing valve on my Kohler
I need to replace the thermostatic mixing valve on my Kohler shower. The part number for the valve from the papers on the original purchase of the whole item is K-401-K … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I am trying to remove my Honeywell am-1 mixing valve for
I am trying to remove my Honeywell am-1 mixing valve for cleaning. I removed the upper assembly but the lower assembly is stuck due to scaling. Any suggestions how to get it out for cleaning?… read more
WCohn
WCohn
Journeyman Plumber
Journeyman License
1,437 satisfied customers
I'm troubleshooting a K-2976 mixing valve install. The
I'm troubleshooting a K-2976 mixing valve install. The temperature is the same, warm. No hot, no cold. … read more
Shane Wolcansek
Shane Wolcansek
Owner
BA
13 satisfied customers
I am installing a k-2975 thermostatic mixing valve, with
i am installing a k-2975 thermostatic mixing valve, with three k-2977 volume control valves. is that installed with a pressure loop? also do i need a control valve for main shower head … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
My mixing valve is behaving incorrectly It runs the shower
My mixing valve is behaving incorrectlyIt runs the shower good and hot but can't stay hot enough to run a full tubIt did up until about a month ago--a full really hot tub of water. Now moderately warm… read more
Rick the plumber
Rick the plumber
Owner
9,857 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