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Sounds like you have a bad zone valve or zone pump. There is either a pump, and the zones in the house have zone valves, or each zone has it own pump.
Zone valves go bad all the time, you can just replace the motor on it instead of sweating the new valve in. The box that is on top of the valve.
What else can I help you with?
How a hot water boiler works?
It heats water to a desired temperature
What are the differences between boilers and burners?
A burner is the part of the boiler that creates and controls the flame that heats the water. If you meant difference between a boiler and a furnace, a boiler makes hot water and a furnace makes hot air.
Does the boiler heat the water at first then supply it to the hot water tank?
No, a hot water tank heats water by itself.
Which is better fire tube boiler or water tube boiler?
The words are literal , a water tube boiler is water inside the tubes with hot gases surrounding them and a fire tube boiler are got gases within the tubes with water surrounding them.
Where does the heating process begin in a hot water heater system?
the boiler.
How a hot water boiler works?
It heats water to a desired temperature
Why must the hot water tank in a house be placed higher than the boiler?
A boiler functions by boiling water to a steam, which rises upwards. Keeping the hot water tank above the boiler helps keep the hot water hot, as well as allowing the steam to carry itself to the tank, instead of the hot water tank producing steam feeding back into the boiler.
Why is the boiler underneath the hot water storage tank?
So the steam can rise from the boiler to the hot water tank storage
At what size is a hot water heater considered a boiler?
NONE a boiler is a boiler and a water heater is a water heaterSEE ASME section IV or the NBBI
Which cheaper to run a combi boiler or a hot water boiler in your home?
combi
What are the differences between boilers and burners?
A burner is the part of the boiler that creates and controls the flame that heats the water. If you meant difference between a boiler and a furnace, a boiler makes hot water and a furnace makes hot air.
What is digester feed pump?
A digester feed pump forces water to a boiler. It works by transferring cool water to the boiler to be heated.
What exactly is boiler service?
A boiler service is where people who specialize in fixing hot water heaters come out and service your hot water heater. They make sure everything is working correctly.
Is there a hot water tank with a com-bi boiler?
Yes
How do you install a gas boiler?
Hot water or steam system?
Which is better fire tube boiler or water tube boiler?
The words are literal , a water tube boiler is water inside the tubes with hot gases surrounding them and a fire tube boiler are got gases within the tubes with water surrounding them.
What principle is being used when heat is transmitted between the boiler and cylinder in a hot water system?
heat is transmitted by gravity between the boiler and cylinder ina hot water system. this is using the principle of?
