- Area
- Hertfordshire
- Postcode district
- WD7
- Nation
- England
- Guide price
- From £90 inc VAT
- Visit
- Rate agreed in advance
Heat pump repairs in Radlett: what to expect
A heat pump that is serviced and set up properly keeps running efficiently for many years. Many heat pump faults trace back to settings, low pressure or a worn part rather than the heat pump itself, and those can usually be put right.
Repairs in Radlett that need a part ordered are explained and priced before the engineer leaves. Heat pump owners in Radlett can arrange a fault-finding visit at a rate agreed before an engineer attends.
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.
- Outdoor units that have become noisy, iced up or keep switching on and off
- Systems losing pressure or needing frequent topping up
- Heat pumps showing an error code or fault light
What's included
- A clear explanation of the fault and a price for the repair before work goes ahead
- Supply and fitting of replacement parts
- Reading of error history and operating data
- Refrigerant repairs by an F-gas certified engineer where needed
- System refill, venting and recommissioning after the repair
We repair heat pumps in Radlett whoever installed them, including older monobloc and split systems.
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 Radlett quote.
Guide prices for heat pump repairs in Radlett
These are guide prices including VAT. The rate for your visit in Radlett is confirmed before we book it, and any repair is priced in writing before parts are ordered.
| Repair | Guide price |
|---|---|
| Fault-finding visit and diagnosis | £90–£190 |
| Sensor or thermistor replacement | £130–£290 |
| Expansion vessel or pressure relief valve | £160–£370 |
| Circulating pump replacement | £260–£500 |
| Fan motor replacement | £320–£680 |
| Refrigerant leak repair and re-gas (split systems) | £370–£1,000 |
| Main control board (PCB) replacement | £470–£1,150 |
Inc VAT. The fault-finding rate is agreed before we attend; repairs are priced in writing before parts are ordered.
Short winter days in Radlett and what they mean
Radlett has about 7 hours 48 minutes of daylight at midwinter and 16 hours 40 minutes at midsummer. That swing matters if you pair a heat pump with solar panels: summer generation can cover much of the hot water, winter generation far less.
What happens when you book in Radlett?
- 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 Radlett.
- 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 Radlett: questions
Do you also cover St Albans?
Yes. We arrange heat pump servicing and repairs in St Albans, which is about 4 miles north of Radlett, and across Hertfordshire.
Can you work on a heat pump in Radlett that someone else installed?
Yes. We arrange servicing and repairs for most air source heat pumps in Radlett, whoever fitted them. Tell us the make and model when you get in touch.
Will the engineer need access indoors as well as outside?
Usually yes. The outdoor unit, the hot water cylinder, the controls and the pipework and valves indoors are all part of the visit, so allow access to each.
How much does a heat pump repair cost?
Heat pump repairs have a typical range of £90–£1,100, including VAT, depending on the part and labour involved. Sensor replacements sit at the lower end, while control boards and refrigerant repairs on split systems sit higher. Every repair starts with a fault-finding visit, with a guide price of £90–£180 for the first hour, and the repair is priced before work goes ahead.
Why is my heat pump showing an error code?
An error code is the heat pump's way of reporting a problem it has detected, such as low water flow, a sensor reading out of range or a communication fault between units. Note the code and check the manual, as some codes clear after a simple reset or pressure top-up. If it returns, an engineer can trace the underlying cause.