Central Heating Repair in Co. Carlow
7 businesses offering central heating repair across Co. Carlow.
A heating system that has stopped heating properly rarely announces which part failed, and the pattern of what is cold says more than the boiler does. Radiators cold at the top and warm at the bottom just need bleeding, because air collects at the highest point. Cold at the bottom is the opposite complaint: something has settled where water should be moving. One cold room while the rest of the house is fine points at that radiator, its valves or the balancing of the system. Everything cold at once points instead at the boiler, the pump, a zone valve or the controls, and those are four very different repairs.
Most of what shortens the life of an Irish heating system sits in the pipework rather than in the boiler. Water standing in steel radiators produces magnetite, a black iron oxide sludge that drops to the bottom of radiators, chokes narrow heat exchanger passages and wears out pump bearings. A power flush or a chemical clean shifts it. A magnetic filter on the return catches what forms afterwards and an inhibitor slows the reaction down, which is why an engineer who cleans a system and fits nothing to keep it clean has done half a job.
Where the work stops being plumbing matters. Anything on the gas side of a natural gas or LPG boiler must be done by an installer on the Register of Gas Installers of Ireland, and putting heating controls on a new circuit is restricted electrical work requiring a Safe Electric registered contractor. Radiators, valves, pumps and pipework carry no such restriction. Cost follows how many radiators are involved, whether the system is being cleaned or partly replaced, how buried the pipework is, and whether zoning is added.
Central Heating Repair in Co. Carlow
DA Plumbing
Carlow, Co. Carlow
DA Plumbing is an RGI registered plumbing company based in Carlow, covering Carlow town and surrounding areas such as Tullow and Bagenalstown. The team handles everything from small repairs to full installations, with an emphasis on precision, reliability, and minimal disruption. Services include bathroom renovations, central heating, tap and toilet installation, leak detection, and 24/7 emergency plumbing. They also specialise in gas boiler installation, maintenance, and repair, as well as hot water systems, water tanks, and outdoor plumbing. Using modern detection tools such as thermal imaging, they locate hidden leaks without unnecessary demolition.
Dan Fenlon Heating & Plumbing
Carlow, Co. Carlow
Dan Fenlon Heating & Plumbing, based in Carlow town, provides heating and plumbing services for domestic, commercial, and industrial clients across Carlow and the surrounding areas. The company handles gas and oil boiler installation, repair, and servicing, as well as bathroom renovations, accessible bathroom upgrades, underfloor heating, heat pumps, and solar systems. They also carry out new builds, house renovations, power flushing, general maintenance, preventative plumbing, and heating controls. The team is registered with RGII, OFTEC, and SEAI, and offers grant-assisted works and finance options through Humm.
James O'Grady Heating & Plumbing Ltd
Carlow, Co. Carlow
James O'Grady Heating & Plumbing Ltd is a plumbing and heating company based in Carlow, Ireland. They handle a range of work from plumbing repairs to gas installations, and are available 24 hours a day for plumbing issues. The company installs, repairs, and services all makes and models of boilers, and also provides gas and central heating services. They aim to offer a friendly and reliable service, with all work carried out by qualified professionals.
John Kavanagh Heating & Plumbing
Bagenalstown, Co. Carlow
John Kavanagh Heating & Plumbing is an RGI registered plumbing and heating company serving Carlow, Kildare, Kilkenny and Dublin. The firm handles domestic, commercial and retail work, offering energy-efficient plumbing solutions and a range of heating services. Their listed services include gas boiler replacement, oil boilers, central heating systems, condensing boilers, boiler servicing, bathroom renovations, limited mobility bathrooms, water pumps, solar heating and underfloor heating. They emphasise high safety standards, compliance with current legislation, and a customer-focused approach, aiming to complete work on time and within budget.
John Lawlor Plumbing & Heating Ltd
Carlow, Co. Carlow
John Lawlor Plumbing & Heating, based in Carlow and Dublin, provides gas and plumbing services across Ireland. The company handles emergency callouts for gas and oil boilers, as well as new installations and bathroom fit-outs. They supply, install, service and repair showers, often recommending full replacement for older electric power showers. Gas boiler installation is a core service, with advice on high-efficiency models and SEAI grants. They also offer annual gas boiler servicing and power flushing to clean central heating systems.
Ó Faoláin Plumbing & Heating
Carlow, Co. Carlow
Ó Faoláin Plumbing & Heating is a plumbing and heating company based in Carlow, serving domestic and commercial clients across Carlow, Kildare, Kilkenny, Wexford and Laois. The team handles gas boiler repair and servicing, gas boiler installation, complete heating installations, bathroom renovation, leak detection and repair, and emergency call-outs. They are RGI registered for gas boiler works and hold public and professional indemnity insurance. The company aims to respond to local plumbing emergencies within one hour and prides itself on five-star Google reviews.
WiseHeat
Carlow, Co. Carlow
Specialist Heat Pump & Air-conditioning service provider offering servicing, maintenance, diagnostics, troubleshooting, repairs, thermal imaging surveys, and F-Gas compliance services.
Common questions
Why is one radiator cold when the rest of the house is hot?
If it is cold at the top only, air has collected in it and bleeding will fix it. If it is cold at the bottom with a warm top, sludge has settled inside and the radiator needs flushing or replacing. If the whole radiator stays cold, suspect the valves, including a thermostatic head that has seized, or a system that has never been balanced so the nearest radiators take all the flow.
Do I actually need a power flush?
It is worth doing where there is real evidence of sludge, such as radiators cold at the bottom, black water when you bleed them, a pump that keeps failing or a boiler that short cycles. It is not a routine service item and it will not fix a fault that has nothing to do with circulation. Ask what the engineer found before agreeing to one, and ask what is being fitted afterwards to keep the system clean.
Can a plumber repair my heating, or does it have to be an RGI installer?
Radiators, valves, pumps, pipework and bleeding are ordinary plumbing and are not restricted. The moment the work touches the gas side of a natural gas or LPG boiler, it must be carried out by an installer on the Register of Gas Installers of Ireland, which is a legal requirement rather than a preference. Oil boilers sit outside that scheme, and OFTEC registration is the usual equivalent to look for.
My boiler pressure keeps dropping. What does that mean?
A sealed system that loses pressure is losing water somewhere, either through a leak on the pipework or radiators, or through the pressure relief valve discharging outside. Topping it up repeatedly treats the symptom and lets a small leak keep soaking a floor or ceiling. It is worth having the cause traced rather than adding water every few weeks.
Other heating engineers services in Co. Carlow
Looking more broadly? Browse all heating engineers in Co. Carlow.