Common Grant Boiler Problems & Repair Advice

Common Grant Boiler Problems & Repair Advice

Common Grant Boiler Problems & Repair Advice

Boilers are normally extremely reliable and provide our homes with heating and hot water whenever we call upon them. When things do go wrong, everyone in the house soon knows about it and to prevent your home sliding into chaos, we’ve put together this handy guide of repair advice.

If your home is installed with a Grant boiler, we’ll be taking you through some of the most common problems you might come across and how to get the boiler going again. Should you be in any doubt at all about what’s wrong with your boiler, use our free service to get quotes from reliable engineers near you.


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Who are Grant?

Grant have been manufacturing and designing boilers for almost four decades, this experience has seen them gain a great reputation for high-quality products.. You can find out even more about them on the Grant Boiler Guide page.

Top 5 Grant Boiler Problems

  1. Reset burner lock out

    Safety switches will switch the burner off whenever there’s a burner malfunction in your appliance. When this happens a ‘lock-out reset’ button will light up, pressing this will bring back normal operation. If the problem persists then an engineer will be needed to investigate.

  2. Resetting the overheat thermostat

    An overheat thermostat automatically switches off the boiler when a control malfunction causes overheating. When this happens, a red neon light will illuminate. Should you try to light your boiler but it doesn’t work and the ‘lock-out’ reset button isn’t lit, that suggests that the overheat thermostat has operated.

    The boiler won’t light until the thermostat is reset. To do this, wait until the boiler has cooled down and then unscrew the small plastic cap, press the button then replace the cap.

  3. Low boiler pressure

    It’s a good idea to keep an eye on your boiler’s pressure gauge quite often, because low boiler pressure can lead to your central heating system failing to function properly. To check the boiler pressure, simply take a look at the built-in pressure gauge, if you see anything below 1 then you may have an issue. Find out more with our guide to low boiler pressure.

  4. Boiler leaking

    Even the smallest of leaks can be a serious boiler issue. A leak could happen for one of many reasons but it tends to indicate that an internal component has broken, normally a seal or valve. This can lead to corrosion, rust or cause electrical components within the boiler to short circuit. Don’t try to repair the fault yourself, instead contact an OFTEC registered engineer as soon as possible.

  5. Hearing strange noises

    If strange rumbling noises are coming from your boiler then it’s likely that limescale or sludge has built-up on your boiler’s heat exchanger, which is known as kettling. This build-up, can restrict the flow of water within the heat exchanger causing the water to overheat, steam and boil.

Which Boiler Issues Need an Engineer?

Some common boiler issues don’t even need an engineer but if in any doubt whatsoever, it’s always best to contact an engineer. Use the table below to identify possible faults with your boiler.


Need a boiler repair?

 

 


Problem Possible Cause Do you need an engineer?
No heat or hot water Broken diaphragms and airlocks, failure of motorised valves, issues with the thermostat or low water levels Yes
Leaking and dripping Most likely to be a broken internal component but it will depend where the water is leaking from Yes
Banging, whistling or gurgling noises Air in the system could be causing this, otherwise it could be that the water pressure is too low Yes
Losing Pressure Could be a water leak in the system, the pressure relief valve needs replacing or due to recently bleeding radiators No, unless there’s a leak
Frozen condensate pipe This fault should be displayed on your boiler as an error code or warning notification Yes
Thermostat issues Thermostat could be turned off or not set to the correct settings (time etc.) Consider replacing
Kettling Limescale or sludge building up on the heat exchanger Yes
Radiators not getting hot Sludge or air building up in the system or an unequal distribution of heat Your radiators will need to be bled which doesn’t require an engineer but if you don’t feel like carrying out the task yourself
Boiler keeps switching itself off Could be low water pressure, a problem with the thermostat or a lack of water flow due to a closed valve, air or the pump not circulating the water in the system properly Yes

Error Codes

Faults with your Grant boiler are displayed as an error code on the display screen. If you’re not sure what it means, take a look through our comprehensive list of Grant error codes.

Should You Replace Your Grant Boiler Instead?

If your current Grant boiler was installed many years ago, then it might be time to consider replacing it. Replacing your boiler could lead to savings of as much as £305* a year if you live in a detached home. Take a look at the table below to see how much you could be saving depending on your current boiler rating and property.

House Type G (<70%) F (70-74%) E (74-78%) D (78-82%)
Semi-Detached £200 £140 £120 £120
Detached £305 £210 £180 £180
Detached Bungalow £155 £105 £90 £90
Mid terrace house £175 £120 £105 £105
Mid terrace house £95 £65 £55 £55

Who Should You Choose to Replace a Grant Boiler?

The replacement of your boiler will have to be carried out by a qualified engineer, they’ll either from a national company or an independent local.

If you go with a national company, you’ll be covered by big brand protection and not only have your boiler replaced but also be offered extra services like ongoing boiler cover.

Local engineers will often offer extremely competitive rates and you’re likely to get a personal service throughout the installation.

When it comes to getting quotes we don’t recommend going with the first one you receive, instead aim to get as many as 3. That way you know that you’re getting the best deal for you.

Boiler Insurance and Ongoing Cover

If your Grant boiler warranty has come to an end, then you might want to consider boiler insurance. Any insurance that offers an annual service and safety inspections is worth thinking about. Taking out insurance can be done with your energy supplier but there’s absolutely no obligation to do so.

Grant Boiler Warranty

Most Grant boilers come with a 3 year warranty, but they can extend to as long as 5 to 10 years when they’re installed by a G-One accredited installer. Our guide to Grant warranties will provide everything you need to know.

To find trusted engineers near you, use our service to receive free quotes for a new boiler installation.

*According to the latest figures from the Energy Saving Trust


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