Gas & Heating Repairs in Stockton-on-Tees

Heating on the blink? Gas heating repairs from £75, most fixed same day. Gas Safe registered (972035).

We cover all of Stockton-on-Tees — the town centre, Norton, Fairfield, Bishopsgarth, Hardwick, Roseworth, Hartburn, Eaglescliffe, Elm Tree, and everywhere in between. Stockton has a real mix of housing: Victorian terraces in Norton and the town centre with aging conventional systems, 1960s-70s semis across Fairfield and Bishopsgarth with tired boilers and old controls, detached family homes in Eaglescliffe and Hartburn with larger heating setups, and modern estates around Elm Tree with combi boilers. We know these systems and what goes wrong with them.

Common Gas Heating Problems We Fix

Radiators cold at the top, hot at the bottom — Air trapped in the system. Bleeding them helps temporarily, but if it keeps happening there’s usually a bigger issue — a failing pump, a leak letting air in, or a system that needs a proper flush. In older Norton terraces, we see this regularly.

No heating but hot water works fine — On a combi boiler, the diverter valve has likely failed — it’s stuck sending water to the hot taps instead of the radiators. On conventional systems with a cylinder, it’s usually a motorised valve (Honeywell mid-position or zone valve) that’s seized. Common repair, usually sorted within an hour.

Boiler firing up then cutting out — Could be low pressure, a blocked condensate pipe (especially in winter), a faulty flame sensor, or overheating from restricted circulation. We’ll test methodically to find the actual cause rather than guessing.

Noisy heating system — Gurgling in radiators means air in the system. Banging or kettling from the boiler usually points to limescale or sludge. A ticking noise from pipework is thermal expansion — annoying but usually harmless. We’ll tell you what’s causing it and what actually needs fixing.

Thermostat or timer not working — Old wired programmers lose their settings, wireless thermostats run out of battery or lose connection, and wiring faults develop over time. If your heating comes on when it shouldn’t, or won’t respond to the controls, we’ll sort it.

Gas Heating Repair Costs

Repair Type	Guide Price
Call-out and diagnosis	From £75
Thermostat or programmer replacement	£75 - £150
Radiator valve replacement (TRV or lockshield)	£80 - £150
Pump replacement (Grundfos/DAB)	£150 - £300
Motorised valve replacement	£150 - £250
Diverter valve replacement	£150 - £250
PCB (circuit board) replacement	£200 - £400
System pressure repair	£75 - £200

Guide prices only — we’ll quote the exact cost before starting any work. The £75 call-out is deducted from the repair cost if you go ahead.

What’s Included

• Full heating system diagnosis — boiler, radiators, pump, valves, controls, and pipework
• Plain explanation of the fault and your options
• Fixed-price quote before any repair work begins
• Quality replacement parts fitted properly
• Full safety testing after every repair
• Gas Safe certificate where applicable
• 12-month guarantee on parts and labour

Our Repair Process

Phone us or book online and we’ll get you in — same-day when we can, especially for no-heating emergencies. We arrive with diagnostic gear and common parts on the van. First step is finding the actual fault. We test the boiler, check every radiator, inspect the pump and valves, and trace any pressure loss or leaks. You get a clear quote before we start anything. Most repairs take one to two hours. Once the part’s fitted, we test the full system — heating, hot water, safety devices, the lot — and hand over a Gas Safe certificate.

Stockton’s Housing Stock and Heating Challenges

The Victorian and Edwardian terraces around Norton and the town centre often still have conventional heating systems. Gravity-fed setups with a cold water tank in the loft and a hot water cylinder in the airing cupboard. These systems rely on motorised valves, cylinder stats, and old Honeywell programmers that all fail with age. The Grundfos pumps in these systems are reliable but after 15-20 years they start to lose pressure or seize completely.

Across Fairfield, Bishopsgarth, and Hardwick, the 1960s-70s housing has a different set of problems. Many of these properties had their boilers replaced in the 1990s or 2000s but kept the original radiators and pipework. Mixing old pipework with newer boilers causes issues — particularly sludge buildup that blocks heat exchangers and reduces efficiency.

The detached homes in Eaglescliffe and Hartburn tend to have larger systems with more radiators, sometimes with separate heating zones controlled by multiple motorised valves. When a zone valve fails, one part of the house heats up while the other stays cold. We carry the common Honeywell and Danfoss valve types for quick replacement.

Warning Signs Your Heating Needs Repair

Watch for these before they turn into a full breakdown:

• Radiators taking noticeably longer to heat up than they used to
• Boiler pressure dropping below 1 bar — you’re topping it up more than once a month
• Unusual noises from the boiler, pump, or pipework
• Heating coming on at random times or ignoring the thermostat
• Lukewarm radiators even when the boiler is running flat out
• Any smell of gas near the boiler or pipework — turn off the gas and call immediately
• Visible damp or dripping around radiator valves, pipework joints, or the boiler itself

When to Repair vs Replace

Pumps, valves, thermostats, and controls are almost always worth repairing — they cost £75-£300 and a new component gives you another 10+ years. Radiators with pinhole leaks from internal corrosion are usually better replaced than patched. For boilers, anything under 10 years old is worth repairing. Over 15 years, weigh the repair cost against a replacement — if the repair is more than a third of a new boiler’s cost, it’s usually time to upgrade. We’ll give you honest advice based on your specific situation.

What if my boiler is showing an error code?

Every manufacturer uses different codes, but they all point to specific faults. We’ll read the code, diagnose the underlying problem, and fix it. Common error codes relate to pressure loss, ignition failure, fan faults, or sensor problems. We carry the parts for most quick fixes. If it’s something unusual, we’ll explain the code, order the part, and return promptly to finish the job.

Do you work on all boiler brands in Stockton?

Yes — Worcester Bosch, Vaillant, Baxi, Ideal, Glow-worm, Potterton, and the rest. If it runs on gas, we can diagnose and repair it. We carry common parts for the makes most fitted across Stockton, so there’s a good chance we can fix it on the first visit. For less common brands, we can usually source parts within a day or two.

Can you bleed and balance radiators as part of a repair?

Yes. If we’re fixing a heating issue and the radiators need bleeding or balancing, we’ll do it as part of the job. Properly balanced radiators heat up evenly and take strain off the boiler. It’s one of those quick jobs that makes a real difference to how well your heating performs.

Are your engineers Gas Safe registered?

Every engineer who works on your gas heating is Gas Safe registered (our number is 972035). You can check this on the Gas Safe Register website. By law, only registered engineers can touch gas appliances. We carry our Gas Safe ID cards on every job and issue certificates for all gas work. We also check for carbon monoxide risks as standard.

What should I do if I smell gas near my heating system?

Don’t touch any switches, don’t light anything, and open windows. Turn off the gas at the meter if you can safely reach it. Get everyone out of the house and call the National Gas Emergency line on 0800 111 999. Once they’ve made it safe, call us to diagnose and repair the fault. Gas leaks are rare but serious — never ignore the smell.

Need your gas heating sorted? Book a repair or check out our full gas heating repairs service. Also covering the wider Stockton-on-Tees area.