Where’s the job?

Scope of Works

• Confirm type of heater matrix (boiler heat exchanger or radiator core) and check part reference

• isolate and drain the affected heating circuit to make the unit safe to remove

• remove outer casing and extract the faulty matrix or core, inspect adjacent pipework and valves

• fit replacement matrix with new seals/gaskets and replace any corroded fittings as agreed

• re-fill and re-pressurise the system, carry out a pressure/leak test and verify heating flow

• remove and dispose of the old unit and debris, leave work area clean and record any follow-up recommendations

Typical Cost

Time on Site

Most domestic heater matrix replacements take 2–4 hours on site for a single unit; allow longer (4–8 hours or return visits) if parts need ordering, access is restricted, a full system flush is required or gas‑safe certification is needed

Questions to Ask Your Tradie

• Are you Gas Safe registered for boiler/heat‑exchanger work and can you provide the number

• do you include seals, gaskets and pressure testing in the quote

• how long will you need on site and will you need to return if parts are ordered

• what warranty do you offer on parts and labour and how are warranty claims handled

• will work require draining the whole system or only the local circuit

• any additional costs likely (scaffolding, pipe replacement, landlord/building consents)

How to Avoid Surprises

• send photos of the boiler/radiator and any nameplate or model numbers before the visit

• clear access and remove fragile items from the work area and ensure parking for the tradesperson

• check parts availability and agree lead times so trades know whether to bring a replacement on the day

• advise the tradie of pets, access arrangements for flats and any building/landlord permissions in advance

• expect Gas Safe checks for gas appliances and allow for PPE and safe disposal of corroded parts