- Area
- Clwyd
- Postcode district
- CH7
- Nation
- Wales
- Guide price
- From £90 inc VAT
- Visit
- Rate agreed in advance
What to know about heat pump repairs in Mold
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.
We repair heat pumps in Mold whoever installed them, including older monobloc and split systems. Outdoor units in exposed spots around Mold can ice more heavily, so siting is checked as part of any icing fault.
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
- Heat pumps showing an error code or fault light
- Heat pumps installed by another company that need a second opinion
What's included
- System refill, venting and recommissioning after the repair
- Reading of error history and operating data
- A clear explanation of the fault and a price for the repair before work goes ahead
- Testing of sensors, pumps, valves, pressures and electrics
- Fault-finding visit at a rate agreed before attending
Across Mold and Clwyd, refrigerant repairs on split systems are carried out by an F-gas certified engineer.
Grants and rules for heat pumps in Wales
Homes in Mold can use the Boiler Upgrade Scheme, which applies in Wales as well as England: £7,500 towards an air source heat pump, or £9,000 when it replaces oil or LPG heating for installations from 21 July 2026 to 31 March 2027. The MCS-certified installer named in your quote applies and deducts the grant.
Heat pump repairs costs around Mold
These are guide prices including VAT. The rate for your visit in Mold 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–£180 |
| Sensor or thermistor replacement | £120–£280 |
| Expansion vessel or pressure relief valve | £150–£350 |
| Circulating pump replacement | £250–£480 |
| Fan motor replacement | £300–£650 |
| Refrigerant leak repair and re-gas (split systems) | £350–£950 |
| Main control board (PCB) replacement | £450–£1,100 |
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 Mold
On the shortest day Mold gets about 7 hours 32 minutes of daylight, with the noon sun around 13° up. The heating season runs from autumn into spring, so a heat pump that is sized correctly and set up with weather compensation does most of its work in steady, cool conditions.
Booking a visit in Mold
- 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 Mold.
- 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 Mold: questions
How much does a visit cost in Mold?
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.
Can you work on a heat pump in Mold that someone else installed?
Yes. We arrange servicing and repairs for most air source heat pumps in Mold, whoever fitted them. Tell us the make and model when you get in touch.
How often should a heat pump in Mold 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.
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.
Is ice on my heat pump a fault?
Some frost on the outdoor unit in cold, damp weather is normal, and the unit clears it with regular defrost cycles, often releasing a little vapour. It becomes a fault when thick ice builds up and does not clear, or when ice blocks the fan. That can point to poor airflow, a failed sensor, drainage problems or low refrigerant, and needs checking.