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Sounds like they are cross-connected somewhere. You may need a plumber to check this.

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10y ago
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Q: Why do your radiators get hot when only have the hot water on and the heating is off?
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Convert a Hot water heating systems?

can a home hot water heating system (radiators) be converted to gas fueled from oil fueled heating meathods?


Why are our radiators heating up when using hot water only setting Upstairs bedrooms affected.conventional system. Copper cylinder etc?

The flow control valve needs an adjustment /replacement


How does hot water get delivered to different radiators in a forced hot water heating system?

There are pipes that feed from radiator to radiator. Or there can be multiple feed pipes and return pipes, it varies based on installation.


Why are the radiators warm but water is cold in a central heating system?

Central heating systems usually heat on a different system from the hot water heater, unless the main heater is a combination furnace/hot water heater. If this is the case, it could be because the outflow of hot water is greater than the ability of the furnace to heat the water.


Why do you need an expansion tank for a hot water heater in concord nh?

Many hot water heating systems with radiators need an expansion tank to operate efficiently. The fact you are in Concord NH is irrelevant.


Have recently had a new hot water tank fitted but when the radiators are heating there is loud banging noises will the tank be empty and will it cause damage if heating is left on thanks?

Sorry, this question makes no sense.


How do I turn-on water supply to hot water boiler it is heating but nothing goes to the radiators?

Check your gauge to make sure you have enough pressure and your flow control valve is not stuck


Why do only some radiators heat on oil furnace baseboard heating system?

The hot water may be turned off to them or the valves could be clogged. Rust and sediment build up over time and stop the flow.


Is it called a hot water heater or water heater?

It's because "hot-water" is a compound adjective, modifying "heater". It's not for heating water, it's for heating a house with hot water. There are many types of heaters that heat water, but only a hot-water heater is used for providing heated water for domestic use. A hydronic boiler also heats water, but it's only for use in radiators.The name "Hot Water Heater" is completely wrong for any use. There is no need to heat hot water. IT has always been "water heater". The term hot water heater has just been used for years because people don't realize the difference. It has always been WATER HEATER.The first answer is jibberish and makes no practical sense at all.


Heater on - water going only to spa - but not getting hot?

If you have no hot water, your heating element is out most likely


How do you stop your upstairs radiators coming on when you only put on the hot water system?

turn valves off at up stairs heaters


Another name for a hot water heating system is a?

Hot water baseboard heating is called a Hydronic heating system.