Why is the hot water running cold in my boiler?

Hot water tap running cold even though combi boiler is fireing… Vocational, Technical or Tra… Hello I have no water at all coming out my hot taps, the pressure dropped and now nothing. I have a combi boiler, the heating is working fine and the … read more Vocational, Technical or Tra… Hi i believe I have problem with my combi boiler. We have

Why does my boiler go off when I Turn on the tap?

With combi your always going to have to run for a while b4 gets hot, this made worse by boiler being far away. Are you turning tap full on cos partial flow from tap will cause water to get to hot and boiler will go off. Being inconsistent could just mean there was some hot water already in the pipe or boiler.

Do you need to turn off hot water supply combi boiler?

However, if your boiler operates with a hot water cylinder, this means that the water supplies are being fed indirectly and you, other than the main stop valve, need to turn off the valve on the cylinder or cisterns outlet supply and you would be done with the issue.

Why does my hot water go cold when I Turn on the tap?

Are you turning tap full on cos partial flow from tap will cause water to get to hot and boiler will go off. Being inconsistent could just mean there was some hot water already in the pipe or boiler. Many combi boilers have a hot water pre heat facility,see if this is selected on. It may make a difference.

Why does my boiler run hot then cold?

The boiler is heating the water, then the water leaving the boiler gets too hot so the boiler shuts down until water leaving the boiler is cool again, and then cycles. One solution is to turn DOWN the required temperature of the water. This will stop the boiler overheating the water. This won’t stop it, as the plate is blocked on the system side.

Can a combi boiler run hot and cold?

That is quite a lot to expect from a combi boiler without backup hot water in a cylinder in the attic. If a combi boiler can’t manage all the hot water demands simultaneously, then it gives hot running water priority. Therefore, it may turn the radiators off temporarily, while someone draws water in the kitchen, runs a bath, or takes a shower.

Why does my Combi water heater keep going cold?

Combi boilers are high-efficiency water heaters and central heating units. They are perfectly able to heat your home and provide hot water, without the need for a separate water tank. But this also comes with one common problem of causing the hot water to go cold or lukewarm and then back to hot again.

Why does my combi boiler turn off when I take a shower?

If a combi boiler can’t manage all the hot water demands simultaneously, then it gives hot running water priority. Therefore, it may turn the radiators off temporarily, while someone draws water in the kitchen, runs a bath, or takes a shower.