- Area
- Greater London
- Postcode district
- W4
- Nation
- England
- Guide price
- From £100 inc VAT
- Visit
- Rate agreed in advance
Heat pump repairs for Chiswick homes
Whoever installed your heat pump, aftercare can be arranged in Chiswick. Tell us the make and model and roughly how old it is, and we will set out what the visit involves before you book.
We repair heat pumps in Chiswick whoever installed them, including older monobloc and split systems. Across Chiswick and Greater London, refrigerant repairs on split systems are carried out by an F-gas certified engineer.
When a heat pump shows an error, loses pressure or stops heating, an engineer diagnoses the cause and explains the repair and its cost before fixing it.
- Heat pumps installed by another company that need a second opinion
- Heat pumps showing an error code or fault light
- Rooms or hot water not getting warm enough
What's included
- Testing of sensors, pumps, valves, pressures and electrics
- Reading of error history and operating data
- Refrigerant repairs by an F-gas certified engineer where needed
- Supply and fitting of replacement parts
- A clear explanation of the fault and a price for the repair before work goes ahead
Repairs in Chiswick that need a part ordered are explained and priced before the engineer leaves.
Grants and rules for heat pumps in England
In England the Boiler Upgrade Scheme gives £7,500 towards an air source heat pump (£9,000 if it replaces oil or LPG, from 21 July 2026 to 31 March 2027), and since 28 April 2026 a valid EPC is no longer needed. The grant is applied for by the MCS-certified installer and shown as a deduction on your Chiswick quote.
Heat pump repairs prices in Chiswick
Guide prices for Greater London, including VAT. We agree the visit rate before anyone attends, so there are no surprises on the day.
| Repair | Guide price |
|---|---|
| Fault-finding visit and diagnosis | £100–£200 |
| Sensor or thermistor replacement | £130–£310 |
| Expansion vessel or pressure relief valve | £170–£390 |
| Circulating pump replacement | £280–£540 |
| Fan motor replacement | £340–£730 |
| Refrigerant leak repair and re-gas (split systems) | £390–£1,050 |
| Main control board (PCB) replacement | £500–£1,250 |
Inc VAT. The fault-finding rate is agreed before we attend; repairs are priced in writing before parts are ordered.
Winter daylight and heating in Chiswick
On the shortest day Chiswick gets about 7 hours 50 minutes of daylight, and the winter sun reaches only around 15° above the horizon at noon. Winters this far south are milder than in most of the UK, which helps a heat pump run at low flow temperatures for much of the season.
Booking a visit in Chiswick
- Tell us the make if you know it, the error code or symptoms, and send photos of the unit and controller.
- We confirm the fault-finding rate and arrange a visit in Chiswick.
- The engineer diagnoses the fault and gives you a written price for the repair.
- Parts are ordered once you agree, and the repair is completed and tested.
Heat pump repairs in Chiswick: questions
How often should a heat pump in Chiswick be serviced?
Once a year is the usual recommendation, and many manufacturers make annual servicing a condition of the warranty. Check your warranty terms for the exact requirement.
How much does a visit cost in Chiswick?
The rate for a service or fault-finding visit is agreed before anyone attends. Any repair is priced in writing before parts are ordered, so you decide before work goes ahead.
What should I check before booking a visit in Chiswick?
Note any error code on the controller, check the system pressure gauge if you have one, and make sure the outdoor unit is clear of leaves or snow. Photos of the unit and controller help.
Do refrigerant repairs need a specialist?
Yes. Any work on a heat pump's refrigerant circuit, such as tracing a leak, replacing a component or re-gassing, must by law be done by an F-gas certified engineer where the refrigerant is fluorinated, such as R32; units using R290 (propane) need an engineer trained in flammable refrigerants. On split systems the refrigerant runs through pipes inside your home, so leaks there are more likely than on sealed monobloc units.
Can you repair a heat pump installed by another company?
Yes. We carry out fault-finding and repairs on heat pumps installed by other companies, including monobloc and split systems. Tell us the make, model and approximate age when you get in touch, plus any error code shown. If the system is still under the manufacturer's warranty, it may be quicker to contact the original installer or manufacturer first.