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No hot water - thermostat not working - Home

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If u have a single handle shower unit remove handle and cover to access the water adjustments[scold protection] blue is cold red is hot faucets are shipped in coldest setting as a safety precaution need to adjust in the hot water

Posted on Dec 04, 2012

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Posted on Jan 02, 2017

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Hi my vulcan gas hot water service isn't getting hot enough anymore? please help me?


check first if you have good water flow to and from heater. lift pressure release valve on inlet and allow few sec to flow, same with outlet hot water safety valve.

remove front cover from the heater, you should see your gas connection and thermostat knob.

check if gas is burning evenly and on whole surface, check for leaks on the heater and on the lines to and from the heater.

if you did not find any faults, no leaks, safety valves work correctly, check thermostats settings,

wind it down to minimal, then turn it to about 1/4 value (you did not specify model but this should do, widening arrow or numerical values ar self explanatory), lift hot water safety valve for few seconds, then open any hot water tap (faucet if you are an american...) and check if gas ignites and burns.

set thermostat to about 2/3 value and again, lift hot water safety valve for few seconds, then open any hot water tap. check if gas ignites and if water is sufficiently hot, if too hot - wind it down to say 1/2 way, if too cold, wind it till resistant and then back off a bit, DO NOT EVER LEAVE VALVE OR THERMOSTAT ON MAX!.

if none of these help - you need either, change the thermostat or heater itself.

if works - you solved the problem, close the tap, close the cover and use the system as you normally do.

i am always recommending use of insulation on the hot water system, it saves heaps of money over the life of the system.

hope this will help you - do not forget to vote... :-)

Apr 09, 2015 | Water Water Heaters

Tip

Electric Water Heater not Working


If you have an electric water heater and it is not making any hot water then you have a problem. The good news is that electric water heaters are not that hard to troubleshoot and there are not a lot of things that can go wrong with them. I will go over the things that can give trouble and how to fix them.

First off if you have some hot water but not as much as you did when it was new then you probably have a bad bottom element. Only the top element is working, so you are only getting about 1/3 of a tank of hot water, replace the bottom element and you will be good again.

If you are making steam, then you have a bad thermostat. While you are making the steam out the relief valve, check to see which element is working. The easiest way to do that is to see which element has 220v on the two screws on the element. That thermostat at that element is bad. Replace it and you will stop the sauna.

If you have no hot water then check the red reset button directly above the top thermostat. You may have to push very hard on it to get it to reset. If the reset is tripped then you have a bad thermostat. Finding out which one can be tricky and timing is important to catch the bad thermostat in the act.

No hot water can also be the result of the top heating element going bad. If the top element goes bad then the top thermostat will never get enough heat to trip on the bottom thermostat. Therefore you will get no hot water. Dual element hot water heaters for residential use, do not ever run both elements at the same time. Only the top OR the bottom will be energized at a time.

This all there is to checking an electric hot water heater. If you are having problems go through this list systematically and you will find your problem and be able to fix it.

For a diagram of how a typical electric hot water heater is wired, check out this tip.

http://www.fixya.com/support/r4422595-electric_water_heater_wiring_diagram

http://www.fixya.com/support/r4656190-electric_hot_water_heater_temperature

http://www.fixya.com/support/r4656414-replace_thermostat_element_electric_hot

http://www.fixya.com/support/r4041115-clean_hot_water_heater

http://www.fixya.com/support/r3689051-home_water_heaters_hot_water_heater

on Apr 28, 2010 | Water Heaters

1 Answer

Unit stiebel Tempra 24Hot water is running through house but cold water pipe is getting hot. Hot water pipe is not getting hot. When cold water connection is removed and water is turned on hot water is...


follow this steps and fix it. God bless you

If there is no hot water, first push the reset button on the high-temperature cutoff; test the thermostat and replace if faulty (see below). Test the heating elements and replace if faulty (see below).
If there is not enough hot water, adjust the thermostat settings. As needed, reset, test and replace thermostats and heating elements if faulty.
If the water is too hot, adjust the thermostat settings and reset. Test and replace the thermostat or high-limit cutoff (see below).
An electric water heater is a 240-volt appliance that can deliver a fatal shock. Always turn off power to the heater at the electrical panel 585dc480-4881-44a8-afda-7267c0f3de26.jpgbefore beginning work, and verify that power has been shut off. Make sure others in the house know not to restore electricity prematurely. If you have any doubt as to whether electricity has been turned off, seek professional assistance.

Oct 02, 2013 | Stiebel Eltron TEMPRA 24 Tankless Water...

1 Answer

Whirlpool hot water heater puts out overly hot water


1) Make sure factory-supplied insulation and cover are reinstalled over thermostats, or cooler room temperature causes thermostat to under-approximate tank temperature, and this causes overly hot water.
http://waterheatertimer.org/images/Tank-with-insulation-2-600.jpg
2) Replace both thermostats.
Sticking thermostat can seem to act normally when tested, but when left alone it sticks, causing runaway overheating.
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html

More resources:
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

Oct 03, 2012 | Water Heaters

2 Answers

Titan Water heater not working. I have the N-85. Came home it wasn't working. Opened it and pressed the reset red button inside. Now the unit is on, SRC 1 and SRC 2 lights are on, like when it is...


Hello

Set the thermostat to a higher temperature if you are experiencing insufficient hot water. There may also be sediment or lime in the tank. If you suspect there is, drain the tank and determine whether water treatment is needed.

Determine whether the electrical switch is turned on or if there is a blown fuse or tripped circuit breaker if you have absolutely no hot water.your high temperature light switch may be open. If it is, reset it. Finally, you may have a non-functioning thermostat, which you'll need to replace.

The thermostat may also be improperly calibrated. In that case, you'll need to replace the thermostat. You may also have long runs of exposed piping that are allowing the water to cool, causing you to need more hot water. In this case, insulate the piping.

Jun 21, 2011 | Heating & Cooling

1 Answer

Woke up to no hot water changed out both heating elements and both thermostats meter says wiers are hot checked breaker its got power still no hot water any suggestions


Water heater can test for power, but is only receiving 120V instead of 240V.
Test that upper thermostat is getting 240V across top two screws of thermostat.

http://waterheatertimer.org/Test-electricity-to-water-heater.html

Upvote the help.
And take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

May 28, 2011 | Reliance & 40 Gal Electric Mobile Home...

1 Answer

St6400c thermostat wont run the central heating independantly


This does not sound like a thermostat problem. I would be looking for a zone valve or circulator pump problem.

Nov 05, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

My thermostatic concealed shower valve only gives either boiling hot water or cold water, there is no inbetween temperature? the cold is fed from mains and the hot from a combi boiler. the plumber has said...


Hi,

If the hot and cold are fitted the wrong way round then the thermostat on the shower unit cannot operate properly!

Most thermostatic mixer showers have a 'bi-metallic' thermostat, if you supply the hot to the cold and vice versa IT WILL NOT WORK.

It is like wearing the left shoe on the right foot and the right on the left! It doesn't work.

Re-install the hot and cold to the correct supply, and this will sort it.

I hope this helps.

Jul 07, 2009 | Grohe Integrated 1/2'' Shower Thermostatic...

1 Answer

Honeywell ST6400C - hot water not working


some digital thermostats do no not work with zone valves is this a new thermostat that you had installed

May 08, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Hot Water is not comming


REPLACE THE CIRCULATOR PUMP ON THE SYSTEM.IT IS NOT PUMPING THE WATER.

Mar 01, 2009 | Honeywell Programmable Thermostat Heater

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