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Rads get very hot when taking a shower heating not turned on

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Hi,
That is because the Flo-check valve(s) in the heating system is bad and allowing the hot water to "gravity" flow through the loops...
Get a HVAC professional to replace the flo-check on your heating system...

heatman101

Posted on Aug 21, 2010

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Posted on Jan 02, 2017

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Why do we need to have to continuously adjust the temperature of the water when we're taking a shower. We have a new Rheem gas .hot water tank


It *may* not be a problem with the water heater itself necessarily. When you say "keep adjusting the water temperature when you're taking a shower" I presume you're talking about turning the shower hot/cold knob(s) and not the temp thermostat on the water heater itself.
If so, when it starts to run colder, turn the knob all the way to full hot. Is the water then very hot? If so, the water heater is working fine & doing its job, and the problem is likely to be in the shower faucet mixing valve itself. Sometimes a faulty one will expand the inner seals/cartridge as hot water flows thru it, and starts to (wrongly) restrict the hot water flow, thus causing the constant need to "turn the dial up a notch".

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I have to turn the hot water tap on full open to get hot water


Type of water heater is unknown
If you have single-handled faucet the faucet cartridge might be bad.
If you have recirculation system, then check valve might be bad.
Copy following links for troubleshoot.
http://waterheatertimer.org/Crossover.html
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html

Jul 16, 2012 | Water Heaters

1 Answer

Its takeing a long time for some of radiators to get hot,and when they do they dont get that hot ,iv flushed the system out,could it be heating by-pass valve in the wrong position


hi there

start by turning off the rads that are geting hot,do the colder rads now get hot? try banging them gentle with a rubber mallet around the valves and across the rad.

If the rads are upstairs and the boiler below it may be the pump is showing signs of giving up.
is the circuit balanced correctley?

Dec 18, 2010 | Water Heaters

1 Answer

Central heating radiators downstairs take a long time to heat up


Problem is balancing & flow. Turn down the other rads until the inlet [flow] pipe is hot but the outlet [return] is luke warm. The rads have two valves - use the one which has a non-operation cap [just turns without doing anything]. when all the rads are the same temperature the system is said to be balanced and should be left like that using the other valves [with operating cap] to turn them on or off as required

Dec 13, 2009 | Water Heaters

1 Answer

No hot water to shower since new rad was added


take the shower head off and make sureits not clogged,, if it's not then valve has dirt in it you need to take the cartdrige out or the stem depending on the diverter and clean it out, but it does appear to be dirt, maybe solder got into the water line and came up there

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3 Answers

Moen posi-temp for shower pressure


Is this only happening in your shower? Or through the hole house? Maybe you shower head has a flow restrictor in it. Try removing it!

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