Boiler Repairs in South Yorkshire — Sheffield, Rotherham, Barnsley & Doncaster
Need repair fast?
Kassgas is your local specialist, fixing boilers across South Yorkshire, including Sheffield, Rotherham, Barnsley, Doncaster, and surrounding areas like Chesterfield.
Our Gas Safe‑registered engineers deliver fast, reliable and affordable repairs for all boiler makes and models.
Why Choose Kassgas for Boiler Repairs?
✅ Gas Safe‑registered engineers – fully qualified & DBS‑checked
✅ ISO 9001 & ISO 14001 certified – quality & environmental guarantees
✅ Domestic & commercial heating specialists
✅ No call‑out fee – honest, upfront quotes
✅ We serve homes in Wickersley, Maltby, Dronfield, Wombwell, and more
✅ Friendly, tidy & professional service every time
What We Do
1. Thorough Diagnosis & Repair
Our engineers assess your boiler’s condition, explain faults clearly, and advise whether a repair or replacement is best for safety and efficiency.
2. Common Faults We Fix
3. Low boiler pressure (~1.5 Bar)
4. Thermostat or valve errors
5. Gas supply or pilot light issues
6. Leaks—detected & sealed onsite
3. Fix First, Replace Only if Needed
We’ll always try to repair cost-effectively. If parts are beyond economical repair, we can quickly recommend a high-efficiency replacement, complete with installation quotes for new boiler systems across South Yorkshire.
More Services to Keep You Warm
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New Boiler Installation — quick, 7‑day service with 5–12 year warranties
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Annual Boiler Servicing — collect warranty compliance & improve efficiency
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Power Flushing — cleans your heating system to boost performance
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Smart Thermostat Fitting, Landlord Certificates, Gas Cooker Installation & general plumbing
📞 Need a Boiler Repair Today?
Don’t sit in the cold — call Kassgas for a fast, reliable boiler repair. 👉 Fill in your details here or call us on 0330 058 9419.
Kassgas Boiler Repairs
During a boiler repair, our priority is to first assess the overall quality of your appliance and then narrow down the part or parts that are causing the fault with the boiler. At Kassgas we will always talk all diagnosis’s through with the customer and fully explain all faults, parts required and the best course of action take going forward.
We will always aim to try and repair boilers before suggesting replacing, but sometimes there isn’t much that can be done. The term we would use is “beyond economical repair’. If we believe that the cost of parts that would have to be replaced to get the boiler back working safely and efficiently is too great then would advise that the money that would be spent on a repair would be best used towards a newer, more efficient boiler that is made to the rigorous standards that the UK market requires.
Common Faults Boilers Face
- Listed below are some common faults that all homeowners should know, to avoid getting taken advantage of.
- Boiler Pressure - If you have a Combi or System boiler then the normal working pressure the boiler should be at is 1.5 Bar. If your boiler has insufficient pressure, try increasing it with the filling loop underneath the boiler.
- No Power - Does your boiler have no lights or display working ? Always check your switch to the boiler or even the plug hasn't been accidentally knocked. Your boiler should be operated on a 3 AMP fuse only to avoid your boiler surging with power.
- Thermostat Issues - Always check your Thermostat has sufficient battery power and has signal to the boiler receiver by turning the controls off and on. All thermostats will show pairing methods in them and will show you how to re-bind them.
- No Gas - Before calling a gas engineer always make sure that you have an active gas line coming to the property by lighting the hob or gas fire. If on a pre-payment meter always make sure there is enough credit on the meter and it hasn't locked itself.
- Leaking Parts - If your boiler has sprung a leak, always turn off your mains cold water stop tap, and bleed your radiator till no more water comes out into a mug bucket to relieve all pressure inside the boiler. This quick action may save you a lot of money in extra parts required.
New Boiler Installation
Boiler Servicing
Boiler Repairs
Power Flush
Landlords / Letting Agents
Plumbing
Smart Thermostat
Cooker Installation
Our gas cooker installations start from only £60 and comply with all safety regulations. Moving house? We can remove your cooker in one property and install it in another on the same day, including weekends.
Commercial Gas Services
We provide comprehensive services including installation and maintenance of gas equipment, thorough safety inspections by Gas Safe registered engineers, and energy efficiency solutions to help you save money and reduce your environmental impact.
Reviews
Our Happy Clients!
We rang Kassgas on Wednesday afternoon. By Thursday afternoon we had a new boiler. Billy fitted our boiler, he was extremely polite and tidy he even took his shoes off each time he came into the house. Not enough words to praise him enough, he took time to explain how to work the new boiler and controls to two pensioners.
Billy and Matt were about to leave when we mentioned that our stop tap was leaking, they stayed behind and fit a new one. It was heartwarming to meet two young men who didn’t want to rip us off.
We would and already have spread the word about this company.
Neil & Sue
SueH-976
Billy and Matt just installed a new boiler. They recommended Ideal with a 12 year warranty. They turned up on time within a week of providing a very good quote. they removed the old boiler, installed the new one, flushed the radiators, added inhibitor, installed new halo wireless thermostats and checked everything was working ok in the space of 5 hours. They removed all the rubbish and left a very tidy finish.
I would definitely recommend themWould definitely recommend Kassgas if you have any heating or boiler problems.
Eric Jones
Why Choose Us
We put customer service and satisfaction above all else. Listening to your needs and doing everything in our power to ensure you are fully happy with everything we do. So if you’re looking for a plumber or heating engineer for your next project, why not give us a call.
Our excellent customer service is second to none, check out our reviews here
