If your boiler isn’t running and/or the water is not flowing cold to the hot water outlet, the issue is probably due to the pressure of your boiler being too either too high or too low.
There is however many other possible reasons, and this guide will discuss the most commonly reported in addition to the most likely solutions.
There is no hot water in the combi boiler: The top reasons and fixes
In the event that your combi boiler isn’t working properly to produce hot water, here are the most frequent causes particularly if you notice that your heating system is operating, but you’ve got no hot water
The most frequent reasons that you have no hot water from boiler but heating working are:
1 – The pilot light is is not illuminated (no flame means not hot water)
Boilers make use of gases (or oil) for fuel – and doing this, you need an ignition pilot.
Pilot lights are small Olympic flames that carry the entire burden of a family’s comfort as well as wellbeing.
In certain circumstances, this flame might disappear or, more frequently it will fail to be caught. This can lead to complete failure, meaning that you’ll have none of the hot water you expect from your boiler.
If you have older boilers you may be able to observe the light source within the boiler’s framework however, in advanced boilers, it will get notified of the boiler’s failings via an error message in a depressing black and white screen.
In the boiler’s instruction manual, you can try to turn off that pilot light.
If it doesn’t work, you’ll require an engineer who can attend to the broken boiler – hopefully, you don’t need to buy a new one.
Fortunately, in the majority of cases this will be an easy fix for yourself and it’s a simple (free) method to bring your boiler’s hot-water back.
Cost to repair (and get hot water again):
DIY: £0.00
Engineer: £75-£160
2 – Frozen pipes
If there is no global nuclear disaster the rule will be limited to winter weather conditions.
Condensate pipes connect our boiler to an exterior wall (or often an inner drain) and permits the removal of water that has been condensed.
Because of the slow flow of rain and unpredictable nature of physics this can occasionally freeze.
When you detect the issue the boiler will be shut off in order to prevent safety concerns, giving your no hot warm drinking water (or heating) even.
Fortunately, this can be repaired at home, by melting the frozen region by covering the pipe with a cloth or pouring warm water on the condensate.
It is necessary to restart your boiler following this issue.
After this the boiler should be able to get its hot water again.
Cost to repair (and get hot water):
DIY: £0.00
Engineer: £50-£150
- Faulty Diverter valve
In every boiler is an inlet valve.
It’s an in-situ traffic director, which controls how water flows as an outcast character from the X-Men.
A malfunction of this device, possibly caused by corrosion of the system or the build-up of metallic over time, could allow only hot water to flow to your radiators, and deplete the hot water supply. This would mean you will not get no hot water from boiler.
In the absence of a possible error code modification It’s not something you can diagnose at home. A heating engineer is needed.
The most ideal scenario is to replace the diverter valve that could cost about £200 including labour expenses, however, you must consider the condition and age of your boiler prior to throwing repairs money at it.
Cost to repair (and get hot water again):
DIY: Unattainable
Engineer: £180-£250
4 . Pressure problems: over or under pressure
The most likely cause is the leak mentioned earlier, however, pressure imbalance or excessively high could cause the absence of hot water from your boiler.
If your boiler isn’t up in pressure, it can generally be resolved with the DIY topping-up.
A boiler that’s over-pressurized may be fought at home with simple radiator bleeding, however when that doesn’t resolve the issue there’s a broken boiler part that needs an engineer in heating or a new boiler. This is the reason of your absence of hot water.
You might also look into a power flush in order to increase the efficiency of your water heating system and avoid blockages.
Cost to repair (and get hot water again):
DIY: £0.00
Engineer: £50-300
The absence of hot water from a system or regular boiler: Top reasons
If you are receiving heating, but not steam from the boiler could be more common when you use an old-fashioned or system boiler that is equipped with hot water tank.
1 – Thermostat/timer malfunction
If you’re adept using your gadgets or keep an check on your energy consumption then you’re likely to be using the timer of your boiler to regulate the time it’s running.
A thermostat problem will create a problem in heating, and not hot water.
If your thermostat also functions as an alarm clock, a problem in it could result in your boiler shutting off completely, depriving your of hot water and sending you back to an age where that you’re blinded.
Cost to repair (and get hot water again):
DIY: £0.00
- Pipe leak or boiler
A pipe or boiler that is leaking will likely cause the pressure dropping.
The leak could result in an insufficient pressure of water that can hinder the flow of hot water the taps.
All general losses in the boiler’s pressure could be addressed by filling your tank with water by hand, but if it is due to leaks, this needs to be handled by a specialist.
Cost to repair (and to get your hot water again):
DIY: £0.00
Engineer: £100-300
- Energy source failure Electric or gas
The absence of gas or electricity in the boiler can be the most apparent and frequent reason for the lack of hot water. It could cause you to be called a stupid sausage for Googling reasons why your boiler isn’t working.
It’s not necessary to go in extensive specifics on how to find out whether you’re connected to an electric or gas supply but you must first ensure that any nearby appliances aren’t affected for example, lighting or a gas cooker. Also, don’t forget to make sure the boiler is turned on at first.
Cost to repair (and to get your hot water):
DIY: £0.00 (unless you’ve failed to pay your energy bills)
Engineer: £50-300
- Inadequate water cylinder size
If you’re not receiving hot water from your system or regular boiler, it could be that the cylinder isn’t sufficient for the hot water needs of your household.
Cylinder sizes vary greatly, with smaller sizes being ideal only for homes occupied by two Hobbits with a lesser consumption of hot water.
If you’re a fan of long showers to cleanse yourself of the shackles of your bad boiler purchasing choice or you’re part of a family that is normal-sized, the hot water in your home will go out within a matter of minutes.
The only solution is to use less hot water, or a bigger tank.
Cost to repair (and get hot water again):
DIY: Unattainable
Engineer: £500-700 (+ fitting)
Is there no hot water coming in your boiler? Here’s the conclusion of a skim-reader
The absence of hot water in your boiler can be caused by various possible causes that can cost anything from nothing to the equivalent of a few hundred dollars, depending on the business you choose to contact to address the problem.
One of the most crucial things to be aware of is that you’re not in hot water
- If you’re not receiving the hot water you expect from your boiler, look into every fix that is free or DIY (mentioned earlier). After you’ve exhausted these solutions, make sure you know the most likely causes of why your boiler isn’t working prior to seeking help from a professional so that you know what ought to be charged instead of what the spanner-wielding clown is planning to charge you on Friday afternoon.
- If your boiler needs an expensive repair, think about the condition of your boiler as well as the possibility of developing further issues in the near term.
When your heating system is at least 10 years old and has issues caused by corrosion or age for example, a malfunctioning diverter valve or frequent leaks, think about a new boiler.