Why does my heating only work when the hot water is on?

Why does my heating only work when the hot water is on?

The valve itself is actually opening hence the heating system is getting hot when the hot water is on but the boiler is only fired up when the hot water motorised valve is open, the boiler should fire up if either valve is open.

Why does my boiler fire up when I turn on cold water?

It happens when air has been trapped in the pipework to the taps (note this is a completely different circuit to the one that heats the radiators). If this doesn’t fix it, the air may be trapped in a “deadleg”, ie a bit of pipework that no longer ends in a tap.

Why does my boiler keep turning itself off?

Lack of water flow If the boiler keeps shutting off, it could be due to closed valves, air caught in the system or a broken pump. If there is enough air in the system to cause your boiler to switch itself off, it should be obvious when you start bleeding your radiators, as plenty of air will gush out of them.

Does turning mains water off affect central heating?

People often worry that turning off their water supply will adversely affect their boiler. The worry is usually caused by a fear of overheating, like boiling a kettle with no water in it, but in reality, it’s unlikely to cause any damage or risk.

Why is my boiler not heating the water?

If the boiler pressure is too high or too low, this can result in your combi boiler not producing hot water. This should release pressure. If this doesn’t work, it may be possible that your boiler has a broken part, and you’ll need to consult an engineer. Boiler leaks can also cause low pressure.

Where is the diverter valve?

It’s usually a lever that’s situated behind the bath taps that you can pull up or push down. System and conventional boilers don’t require a diverter valve. This is because the hot water they produce is stored in a hot water cylinder.

Does cold water go through boiler?

Cold water from the mains will pass through the boiler where it’s heated up and then travels through the pipes to either the radiators, tap or shower. Unlike system and regular boilers, there are no cylinders or tanks. Combi boilers will heat up and deliver hot water instantly as and when needed.

Why does my boiler come on when I flush the toilet?

One of the most common causes of a noisy toilet is a dirty valve. First you need to turn the water supply off, and remove any dirt and debris you can locate into the valve. Check for any kind of leaks before switching the water back on, and the noise should be gone.

Why does my boiler turn off after a few minutes?

Finding that your boiler turns off after a few minutes could be due a frozen condensate pipe. Water in your condensate pipe can often freeze in the colder months, thus causing a blockage. This will prevent waste water from being disposed of, which will lead to your combi boiler cutting out.

Can a boiler turn off by itself?

If your boiler keeps turning off by itself, it does so on its limit because of lack of water flow. Basically, your boiler is overheating, so it turns itself off for safety. Otherwise, the boiler will melt. The boiler has a temperature sensor that checks the water temperature.

Does shutting off water affect boiler?

Shutting off the main water supply valve to the house would have no effect on the operation of your hot water boiler. Actually, while you are gone for a week, an hydronic heating pipe bursting might not be quite as bad as a regular domestic water pipe bursting.

Will a combi boiler work if the water is turned off?

Is it safe to turn the water supply off? As long as your boiler is in working order, it is safe. A combi boiler would shut down automatically if it detected a drop in mains pressure or the temperature got too high.

Why does my boiler turn off when I Turn on the heat?

You can check boiler pressure by looking at the pressure gauge on the boiler. If the pressure is too low then the boiler will turn off. The leading causes of low boiler pressure includes a leak somewhere around the heating system. Check all of the radiators, pipes and around your boiler for water.

What to do when your boiler turns on when cold water is running?

Try turning cold water tap on very low checking the boiler and then slowly increasing and see if that fires up boiler, and also try is flushing the toilet. Not normal. Call your RGI to rectify.

What happens if you turn off your water supply?

People often worry that turning off their water supply will adversely affect their boiler. The worry is usually caused by a fear of overheating, like boiling a kettle with no water in it, but in reality, it’s unlikely to cause any damage or risk. We’ll have a look at running your boiler without a water supply here, so if you’re worried, read on.

Why does my boiler lock up in the winter?

Modern condensing boilers are fitted with a condensate pipe which leads waste acidic water away from the boiler and down a drain. Due to their location, the water in a condensate pipe can be susceptible to freezing during the winter. Should this happen then the frozen water will cause a blockage and the boiler will lockout.