Boiler repair in Portsmouth
Most Portsmouth call-outs involve compact combis in terraces and converted flats. Book a Gas Safe registered engineer with the price agreed up front.
Common boiler faults in Portsmouth
With so many terraces and converted flats in Portsmouth, most call-outs involve compact combis. The usual problems are pressure dropping, no hot water because of a stuck diverter valve, ignition lockouts and frozen condensate pipes on exposed walls. Older systems also suffer from sludge. If the boiler is over twelve years old, ask the engineer for a replacement figure beside the repair.
Victorian and Edwardian terraces: Lots of mid-life combis and older systems with original radiators. Sludge, sticking valves and pressure loss are regular faults.
Converted houses and purpose-built flats: Low pressure, failed diverter valves and condensate pipes freezing on exposed walls are common reasons for call-outs.
1930s semis on the mainland side: Some still run regular boilers with loft tanks, so pump, valve and tank faults turn up alongside typical combi problems.
Boiler repair prices in Portsmouth
| Job | Typical price | Typical visit |
|---|---|---|
| Diagnostic visit | £80 to £120 | about 1 hour |
| Pump, valve or fan replacement | £150 to £350 | 1 to 3 hours |
| Main circuit board (PCB) | £250 to £450 | 2 to 3 hours |
| Annual boiler service | £80 to £120 | about 1 hour |
Typical prices including VAT, checked October 2026. Your installer gives you a fixed price in writing before any work starts. More detail in our boiler repair cost guide.
Boiler over 12 years old?
Repeat repairs on an old boiler add up. Compare a fixed replacement price in Portsmouth before you pay for another part.
See boiler replacement optionsAreas we cover around Portsmouth
- Southsea
- Fratton
- North End
- Copnor
- Milton
- Eastney
- Hilsea
- Cosham
- Drayton
- Farlington
Also nearby: Boiler repair in Southampton, Boiler repair in Brighton, Boiler repair in Bournemouth
Boiler repair in Portsmouth: questions
What is the price of a boiler repair in Portsmouth?
In Portsmouth, an engineer typically charges £80 to £120 to diagnose the fault. Fitting a replacement pump, fan or valve usually costs £150 to £350, and a new main circuit board £250 to £450. The engineer gives you the price before going ahead.
My combi keeps locking out. What causes that?
Common causes include low pressure, a blocked condensate pipe, a faulty ignition electrode or a gas supply problem. Note the fault code on the display and check the pressure gauge before you call, as it helps the engineer bring the right parts.
Who is responsible for the boiler in a rented flat?
If you rent, the landlord is responsible for repairs and an annual gas safety check by a Gas Safe registered engineer. If you own a leasehold flat, the boiler inside it is normally your responsibility, but check your lease.
There is a gas smell in my home. What now?
Open windows if you can, get out of the property, leave all switches as they are and call the National Gas Emergency Service on 0800 111 999. Book a repair only after they have made it safe.