2
   

Hot Water Temperature Varies

 
 
msmarg
 
Reply Sat 31 Oct, 2009 06:07 am
What makes the hot water temperature in my shower vary from day to day? One day it'll be just warm; the next day it'll be so hot that I have to mix in some cold water. Oh, it's a gas water heater.
  • Topic Stats
  • Top Replies
  • Link to this Topic
Type: Question • Score: 2 • Views: 5,174 • Replies: 10
No top replies

 
sullyfish6
 
  2  
Reply Sat 31 Oct, 2009 06:58 am
Depends on what was done before you had your shower.
If you did a couple of loads of wash or followed someone else who showered, your water heater is just not keeping up with the demand.
How old is it?
0 Replies
 
engineer
 
  2  
Reply Sat 31 Oct, 2009 07:29 am
@msmarg,
Outside water temperature. The shower mixes "cold" water from outside the house with hot water from your water heater. The hot water is around 120 deg F and is controlled by a thermostat. The outside water is whatever it is. When I was growing up in the deep South, the outside water temperature in the summer was 80+ degrees. I just needed to crack open the hot water to get good bath temperature. In the winter, outside water temperature would drop to the 50's so much more hot water was needed.

As noted in the previous post, if your hot water heater is cold because you've used up all the hot water or because the thermostat is off, that is another issue.
JTT
 
  1  
Reply Mon 2 Nov, 2009 02:47 pm
@engineer,
I don't think seasonal changes can account for daily differences like these, Engineer. My first guess is a faulty thermostat but I've never seen a thermostat do this. My next guess, poltergeists.
0 Replies
 
roger
 
  1  
Reply Mon 2 Nov, 2009 04:03 pm
@msmarg,
That's just the way they work, msmarg. Maintaining a constant temperature would be more complex and more expensive. Rather than heating the water continuously, the gas or electric comes on a a preset point, and continues to heat it till the high temperature limit is reached.

If you run a bit of hot water before showering, it should kick in, and give you a nice hot shower.

JTT
 
  1  
Reply Mon 2 Nov, 2009 04:29 pm
@roger,
Quote:
Maintaining a constant temperature would be more complex and more expensive. Rather than heating the water continuously, the gas or electric comes on a a preset point, and continues to heat it till the high temperature limit is reached.


I don't think that's quite right, Roger. Water is heated to the temperature that the thermostat is set at, I believe the factory setting is around 140 degrees F. If there has been no pull on the hot side for a period of time, the entire tank volume will be heated pretty close to the set thermostat temperature.

A water heater never heats to the hi-limit point unless there's a malfunction at the junction. Then the pressure-temperature relief valve opens and some pretty scary stuff blasts out.
0 Replies
 
KayeL
 
  1  
Reply Thu 20 Sep, 2012 08:58 am
@msmarg,
I'm having the same problem with my gas tank. First thing in the morning it can be scalding hot or merely lukewarm. My tank is fairly new so surely there is not a temperature gauge problem?
roger
 
  1  
Reply Thu 20 Sep, 2012 09:24 am
@KayeL,
This sounds like a normal operating condition.

If you don't want scalding hot water, dial down the thermostat on the side of the tank. If the water is lukewarm at a faucet, let it run briefly till the water temp drops to the low limit, at which point the gas or electric element cycles on. It will then heat the water to the high temp setting.
0 Replies
 
jcboy
 
  1  
Reply Thu 20 Sep, 2012 09:40 am
That happens to me everyday but that’s because I have one of those tankless water heaters, boy I’ll never have one of those again!
jcboy
 
  1  
Reply Thu 20 Sep, 2012 09:45 am
@jcboy,
I didn't realize this thread started in 2009, she probably has a new water heater by now Cool
0 Replies
 
roger
 
  1  
Reply Fri 28 Sep, 2012 02:02 am
What mixing valve are you referring to, and why does a bad mixing valve call for an element replacement. I would be extremely displeased if any part of a hot water system required replacement after only two years.
0 Replies
 
 

Related Topics

Poo-tee-weet? - Question by boomerang
Let's just rename them "Rapeublicans" - Discussion by DrewDad
Which wood laminate flooring? - Question by Buffalo
Metal Roofs pros & con s - Question by Swimpy
Buying a new entry door - Question by sozobe
Need water help - Question by richierich
Lifesource Water versus a 'salt' system - Discussion by USBound
Rainsoft - Discussion by richb1
 
  1. Forums
  2. » Hot Water Temperature Varies
Copyright © 2021 MadLab, LLC :: Terms of Service :: Privacy Policy :: Page generated in 0.03 seconds on 12/06/2021 at 05:48:02