So to answer the main question – “Should my boiler be hot to the touch?” – the answer is no, but some will indeed get quite warm. Remember that an overly warm boiler is almost certainly an inefficient one, as heat will be leaking out around it rather than into the cylinder, radiators and taps.

How hot is a boiler supposed to get?

Recommended Temperature Settings
Typical low-temperature settings should be within the range of 120-160 degrees Fahrenheit and high-temperature settings should be within the 180-200 degree Fahrenheit range. If you need the temperature to be warm, try to stay around 200 degrees at the highest.

Why does my boiler feel hot?





Why do boilers overheat? A common reason why boilers overheat and cut out is when hot water that needs to be sent to the cylinder, taps or central heating system is not circulating effectively. Normally, this is due to a failing pump or blockage in the system such as a build-up of limescale.

How do you know if your boiler is overheating?

If your boiler is switching itself off automatically or is cutting out, the chances are it could be overheating. Alternatively, you may find that your boiler won’t shut off at all, and this is another potential indicator of overheating.

How do you know if something is wrong with your boiler?

10 Common boiler problems

  • Leaking.
  • Low boiler pressure.
  • No heating or hot water.
  • Frozen condensate pipe.
  • Radiator faults.
  • Boiler not responding to thermostat.
  • Gurgling, banging or whistling noises coming from your boiler.
  • Pilot light keeps switching off.

What should boiler pressure be when heating is off?

When your boiler and heating is on pressure should be between 1.0 to 2.0 bar. When the heating is off, boiler pressure should be between 1 and 1.5 bar. If you need to top up the pressure – add water via the filling loop. If you need to reduce pressure, consider bleeding your radiators.

What is the normal boiler pressure?





Around 2 bars

The ideal boiler pressure should be between 1 to 1.5 bars on your pressure gauge when your heating is switched off. Around 2 bars is a normal pressure level when your boiler is active/heating up. Anything below 0.5 is too low and must be replaced.

Can a boiler get too hot?

Boiler overheating is a serious problem that in the most severe cases can put the unit at risk of explosion. Fortunately, modern boilers are fitted with safety features that mean the unit will lockout before the boiler overheats.

Can a boiler explode?

While historically, boilers would over-pressurise and explode with alarming regularity, modern boilers are manufactured to be able to withstand excessive pressure, and can typically handle an operating pressure of 20 PSI. When pressures increase beyond this level, the boiler can fail, which can lead to an explosion.

Does a combi boiler get hot?



Combi boilers work by signalling a sensor once you’ve requested hot water which tells the boiler to burn fuel (whether gas, electric or oil). The heat exchanger then gets hot enough to heat the water when it flows over it. The control valves within combi boilers work in different directions to one another.

Why is my boiler not reaching set temperature?

The size of your thermostat is most likely the reason why this issue would happen. Other reasons (see the list) are very possible as well but if the thermostat temperature is too small for a home or not designed to cover an area size, it might not reach the set temperature.

What are the common boiler problems?

Top 12 (most common) boiler problems:
#1 Boiler Leaking. #2 Low Boiler Pressure. #3 Boiler Kettling/Noisy Boiler. #4 No Heating or Hot Water.

How do I know if my boiler needs water?



7 Signs Your Boiler Needs Repair

  1. Water Leaks. Water leaks are an obvious sign of trouble, though the actual culprit can be difficult to pin down. …
  2. Unpleasant or Unusual Smells. …
  3. Strange Sounds. …
  4. No Heat or Hot Water. …
  5. Water Not as Hot. …
  6. High Energy Bills. …
  7. Boiler Turns Itself Off.

Is 2.5 bar too high for a boiler?

Your boiler should be running between the 1 bar and the 1.5 bar, which will be in the green section of the boiler pressure gauge. If the bar is hitting over 2.5 bars, then the pressure from the water in the system is too high, and anything below 1 bar is too low.

How often should you top up boiler pressure?

twice a year



The pressure in the system will usually require topping up once or twice a year. If you are having to repressurise your heating system much more frequently, please contact your installer.

Is 3 bar too high in boiler?

High boiler pressure isn’t dangerous, even if it’s showing as three bar on the pressure gauge. In most cases, the boiler will turn itself off if the pressure goes about a certain level and a working PRV should successfully control the pressure, preventing it from getting too high.

Does bleeding radiators reduce boiler pressure?

Yes. During the process of bleeding radiators, air is released from within them, which in turn reduces the pressure in your boiler system.

Does running hot water reduce boiler pressure?

High boiler pressure can have a variety of causes. But before getting into those, it’s important to note that your boiler pressure will naturally rise whenever your heating or hot water is in use. This will cause a spike in the reading but there’s no need to panic because it’s normal.

What should pressure be on combi boiler?



between 1 and 1.5 bar

What pressure should combi boilers run at? The pressure of your combi boiler should be between 1 and 1.5 bar. If your pressure reads at less than 1 bar, it’s possible that you have lost water from the system via a leak.

Can a boiler lose pressure without a leak?

Can a boiler lose pressure without a leak? If you have found no leaks and your boiler is still losing pressure, the cause may instead be a boiler leak, a hidden leak on the system.

What temperature should a combi boiler be set at?

For a modern combi boiler, the radiator heating temperature should be set at or around 75 degrees celsius for the best efficiency and performance.