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Hot water tank is overheating excessive rumbling of boiling water

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Could be a thermostat or grounded element not to serius to fix should consider a prfetional unless you are handy with electicity and water

Posted on Jul 19, 2008

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Water boiling in the overflow reservoir


Considering that the vehicle was never intended to reach the extremely high mileage it has, it is possible that pressure loss from the one of the cylinder chambers is occurring and leaking into a coolant channel, causing air bubbles to surface at the coolant reservoir. In this case, it may be a bad head gasket or a cracked head. Have you noticed a significant decrease in engine power of late? Is there any oil sheen appearing at the top of the coolant in the reservoir?

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Hi,

Need to know more about the system... zone valves ot pumps....indirect hot water tank or internal coil??

Here is a tip that I wrote that may shed some light on things for you...


In most cases problems with the circulator pump boil down to two problems.
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I am having problems with the connections of my hot water heater. The connection of the cold water to the water tank leaks around the connection. When I tighten it the pipe twisted and it started...


Remember, that COLD water might cause condensation as it nears the Hot Water tank--

However, you seem pretty sure it was leaking-- so-- What type of piping are we working with: Copper, Plastic, or what?

Copper is the best-- but requires soldering fittings-- are you equipped to do that?

Plastic has shrink and expand problems around a Hot Water tank, and might be why you have the leak?

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1 Answer

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Hello
16 yrs old? Im guesing this is a hot water heater.Not a air conditioner.

If its still making hot water you may not need to replace the whole unit.
The valve that is leaking is a high pressur relief valve and they do go bad the sprigs become weak over time and some corrosion may not allow the valve to seat properly.

1st step is to shut off all incoming and out going water to the tank.
2nd Shut off fuel or gas to the unit, and annonce to everyone your are working on the hot water heater.
3rd at the very bottom should be a drain valve much like a hose spicket,open this slowly and drain the tank,remember the water will be hot.You may not need to drain it all the way,while draining pop open the relief valve,when you stop getting water from it,you are below it and can turn the drain valve off.
4th remove old relief valve and replace with a new one,i think they are rated at 15 psi or 30 psi blowoff pressure,hopefully there is a tag on it with that info.

When you go to install your new one use some pipe thread compound or teflon tape around the threads before you reinstall valve.
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