If there’s a problem with your heat network
Mae'r cyngor hwn yn berthnasol i Cymru. Gweler cyngor ar gyfer Gweler cyngor ar gyfer Lloegr, Gweler cyngor ar gyfer Gogledd Iwerddon, Gweler cyngor ar gyfer Yr Alban
The most common problems with heat networks are where:
the heating has stopped working for everyone on the same heat network - this is called an ‘outage’
there’s a problem with your meter or Heat Interface Unit (HIU)
If you’re not sure if your home is on a heat network
Heat networks are a way of heating blocks of flats or groups of homes. Heat networks are sometimes called 'district heating' or 'communal heating’.
If you’re on a heat network, heat is pumped into your home. This supplies your heating and it might also supply your hot water.
If your home has an HIU, you use it to control how much heat from the network enters your home. HIUs don’t produce heat. Some HIUs look like a gas boiler but they aren’t connected to mains gas and they don’t have a flue. A flue is a pipe that carries exhaust gases from a boiler to the outside of your home.
If you’re not sure if you’re on a heat network, ask your landlord or property management company.
Contacting someone about the problem
Start by checking who you pay your heating bill to.
If you pay heating bills to your landlord as part of your rent, tell your landlord if you think there’s a problem. They should contact the heat network supplier and resolve the problem.
If you’re worried about your landlord evicting you, talk to an adviser.
If you pay heating bills to anyone else, you should contact your heat network supplier. This applies if you pay your bills to the heat network supplier, a management company or freeholder. You can get their contact details from their website or from a recent letter or bill.
Talking to your landlord or heat network supplier
When you contact your landlord or heat network supplier, tell them what’s happening, and what you want them to do. They might be able to solve your problem while you’re talking to them.
Write down the date and time you talk to them, and what you talk about. If you speak to them on webchat, ask for the transcript. This means you'll have a record of the conversation.
If you write to them, include your account number and any case reference numbers, if you have them. This makes it quicker and easier to sort out your problem.
If your heating or hot water stopped working
This might be an outage if it’s also affecting other homes on the same heat network.
Your heat network supplier should contact you or your landlord about an outage within 24 hours.
If they contact your landlord, your landlord might:
pass on information from the heat network supplier to you
ask you to contact the heat network supplier yourself
Ask your landlord what the heat network supplier is going to do to fix the problem, and how long it will take.
You can also ask if the heat network supplier can:
give you emergency heating like a portable heater
pay you compensation
give you a refund on your heat bills
They don’t have to do these things, but it’s worth asking.
Staying warm while your heat network has an outage
If you’re cold, you can:
wear extra layers of clothing - especially socks and slippers
use hot water bottles, heated throws or electric blankets if you have them
move around and gently exercise, if you can
use a portable electric heater - although these can be expensive to use
It’s also important to eat regularly and have at least one hot meal a day.
You can also ask family or friends if you can stay with them while your heating is fixed.
If there’s a problem with your meter or HIU
Your heat network supplier is responsible for making sure your meter and Heat Interface Unit (HIU) work properly.
Contact your landlord or heat network supplier if you think there’s a problem. Ask them to:
find out what the problem is
fix the problem
confirm everything in writing, including what they’ve done to investigate the problem, what they’ll do to fix it and how long it will take
If your heat network supplier can’t fix your meter, they should write to you and explain how they will calculate your bill. For example they might:
estimate how much heat you’re using - this is called an ‘assumed basis’
work out the amount of energy used by all homes on the heat network and divide the cost between those homes - this is called a ‘pooled supply’
Make a complaint
It's worth making a complaint to your heat network supplier if:
they don't reply when you report the problem
they don't fix the problem in a reasonable amount of time
It's best to follow your heat network supplier's complaints procedure - you can usually find this on their website.
Start by gathering any supporting evidence. What you’ll need depends on your issue - for example you could gather:
photos of a faulty meter
copies of bills
notes of conversations
emails from your supplier about the problem
You’ll also need your account number. You can find this on a recent bill.
When you’re ready, you can complain to your heat network supplier by phone or in writing, for example by email, webchat or posting a letter.
If you need more help, a trained adviser can give you advice over the phone. They might be able to help you reach an agreement with your heat network supplier or support you when making a complaint. Contact the Citizens Advice consumer service.
Complaining by phone
You’ll need to explain the problem when you call, and tell them how you’d like them to resolve it - for example, by giving you money back if they’ve overcharged you.
Ask them how long they’ll take to reply, and if they have a reference number for the complaint.
It’s worth writing down the time and date you call, and who you speak to - you might need this later.
Complaining in writing
When you make your complaint in writing, you’ll need to explain:
what the problem is, and when it started
how they can resolve it - for example, by giving you money back if you’ve been overcharged
You can complain by email using the address listed in your heat network supplier’s complaints procedure. If you can’t find an email address, you can call your heat network supplier and ask them for it.
Make sure you keep a copy of any webchat transcripts or email conversations with your heat network supplier - you might need them later.
If you’re sending a complaint by post, ask the Post Office for free proof of postage - you might need to prove when you sent the letter.
If you live in a council or housing association home
If you’ve reported repairs to your landlord and they haven’t done anything, make a complaint to your landlord using their complaints procedure.
If complaining doesn’t solve your problem, you can ask the Housing Ombudsman to look at your complaint.
Check how to complain about your landlord's failure to make repairs.
If you live in a private rented home
If you’ve reported repairs to your landlord and they haven’t done anything, it’s best to talk to them first to solve your problem.
If talking to your landlord doesn’t help, there are other steps you can take to complain.
Check how to complain about your private landlord.
If complaining doesn't solve your problem
You might be able to make a complaint to the Energy Ombudsman to help resolve your problem. The rules about complaints depend on when the problem started.
If the problem started on or after 1 April 2025
If it’s been 8 weeks since your first complaint to your supplier, you can complain to the Energy Ombudsman.
The Energy Ombudsman is impartial - they’ll look into both sides of the case and make a decision. If they think your supplier dealt with your complaint unfairly, the Ombudsman can make your supplier change their decision.
Check how to complain to the Energy Ombudsman.
If it hasn’t been 8 weeks since your first complaint, it's worth contacting the supplier again. Tell them why you aren't happy and what you want them to do.
Contact the Citizens Advice consumer service if you need more help - a trained adviser can give you advice over the phone.
If the problem started before 1 April 2025
You should check if your heat network is registered with Heat Trust on the Heat Trust website.
If they’re registered with Heat Trust, you can complain to the Energy Ombudsman. You need to wait 8 weeks after your first complaint to your supplier. Check how to complain to the Energy Ombudsman.
If they aren't a Heat Trust member, ask if they're happy for you to send your complaint to the Energy Ombudsman. They don't have to agree but it's worth asking.
If they agree to let you complain to the Energy Ombudsman, you'll need to send a 'letter of consent' with your complaint. Ask your heat network supplier for a 'letter of consent'.
The Ombudsman will look at the problem and make recommendations for how to resolve it.
If your heat network supplier doesn't agree to let you send your complaint to the Energy Ombudsman, contact the Citizens Advice consumer service for help.
If you need extra support
If you find it hard to deal with your energy supply you might be able to get extra help from your heat network supplier.
Contact your heat network supplier and ask what support they can give you. For example, you can ask them to:
make your call a priority when you contact them
send someone to check your meter regularly
send you bills in large print or braille, or to another person - for example, a family member or carer
If your heat network supplier treats you unfairly or harasses you because you need more help, this might be ‘unlawful discrimination’. This means it’s against the law. Check if you've experienced discrimination.
If you pay for electricity separately to heat
You can apply to be added to your electricity network’s priority support register to get priority support for electricity.
Check if you can get extra support from your electricity supplier.
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