Hometree Group
Hiring now
On-site · Exeter, England, United Kingdom£35k–45kFull-timeUpdated 4 weeks ago
Hometree Group
Apply£35,000–£45,000 Salary Equivalent + Performance Incentives | Company Van | Private Medical Insurance | Paid Travel Time
Location: Ideally located within reasonable travelling distance of Exeter or Helston
Pay: £35,000–£45,000 salary equivalent, depending on experience, based on a 40-hour working week. Performance incentives and overtime provide the opportunity to achieve higher on-target earnings.
Job Type: Full-time
GreenGenUK is continuing to expand across Devon and Cornwall, and we are looking for an experienced Air Source Heat Pump Service Engineer to join our growing service and maintenance team.
Established in 2011, GreenGenUK has become one of the South West’s leading renewable-energy installers and is proud to be part of the Hometree Group. With more than 50 directly employed team members, a substantial installed customer base and continued investment in our people, there has never been a better time to join us.
We install and maintain hundreds of renewable-heating systems each year and now support more than 1,000 heat pump customers. Our reputation has been built on quality workmanship, strong technical knowledge and excellent customer service.
This is a new, full-time position created as our service and maintenance workload continues to grow.
✔ South West Renewable Heating Installer of the Year 2025
✔ Established renewable-energy business with over 50 employees
✔ Part of the Hometree Group
✔ Large and growing heat pump customer base
✔ Strong pipeline of planned service and maintenance work
✔ Company van and paid travel time
✔ Private medical insurance
✔ Performance incentives and overtime opportunities
✔ Working-away opportunities with enhanced rates
✔ Manufacturer training and support for individual systems
✔ Support from an experienced in-house technical team
✔ Long-term job security within a growing sector
You will carry out planned servicing, fault diagnosis, repairs and performance optimisation on domestic air source heat pump systems throughout Devon and Cornwall.
This is primarily a service and maintenance role. You will need to understand and assess the complete heating system rather than considering the heat pump in isolation. This includes the heat pump, heating controls, hot-water cylinder, pumps, valves, emitters, electrical components and system hydraulics.
Your work will include:
Planned annual servicing of air source heat pump systems
Attending breakdowns and investigating reported faults
Mechanical, hydraulic, electrical and controls-based fault finding
Repairing or replacing defective system components
Diagnosing poor performance, high energy consumption or comfort issues
Checking and optimising weather compensation and heating curves
Reviewing flow temperatures, system pressures, flow rates and temperature differentials
Inspecting cylinders, pumps, valves, filters, expansion vessels and heating controls
Completing commissioning checks following installations or remedial works
Carrying out warranty inspections and manufacturer-authorised remedial work
Identifying additional repairs and providing clear information for quotations
Liaising with manufacturers, technical support and our internal operations team
Explaining system operation clearly to customers
Providing customers with practical advice on using their system efficiently
Completing electronic job sheets, photographs, test results and service records
Maintaining suitable van stock, tools and test equipment
Supporting installation teams with technical fault finding when required
You will work on systems from manufacturers including Mitsubishi Electric, Vaillant, Samsung and other established heat pump brands.
You do not need previous experience with every system we work on. GreenGenUK will provide manufacturer training and ongoing technical support for individual products and systems.
The role includes paid travel throughout The South West.
We are looking for an experienced and methodical heating engineer who enjoys fault finding and takes pride in resolving problems properly.
You should be confident working independently in customers’ homes while knowing when to seek assistance from manufacturers or GreenGenUK’s wider technical team.
The successful candidate should have:
Practical experience servicing, commissioning or repairing air source heat pumps
NVQ Level 2 plumbing and heating qualification as a minimum, with Level 3 preferred
G3 Unvented Hot Water qualification
Strong knowledge of domestic wet central-heating and hot-water systems
Good electrical and controls-based fault-finding ability
An understanding of system balancing, flow rates and weather compensation
The ability to interpret technical manuals, wiring diagrams and system schematics
A logical and methodical approach to diagnosing faults
Strong customer-facing and communication skills
The ability to explain technical issues in straightforward language
Confidence using a mobile phone or tablet to complete service records
The ability to work independently and manage a field-based workload
A professional attitude and commitment to high-quality workmanship
A full UK driving licence
The following would be advantageous, although manufacturer and product-specific training will be provided:
Mitsubishi Ecodan experience or manufacturer training
Vaillant aroTHERM experience or manufacturer training
Samsung heat pump experience or manufacturer training
Experience working with R290 heat pump systems
A recognised heat pump installation or service qualification
Electrical qualifications or formal electrical fault-finding training
Water Regulations qualification
F-Gas and/or hydrocarbon refrigerant training
Experience with underfloor heating and multi-zone heating controls
Familiarity with MCS standards and renewable-heating commissioning documents
£35,000–£45,000 salary equivalent, depending on experience
Performance-related incentives offering the opportunity to earn more
40-hour working week
Paid travel time
Overtime opportunities
Enhanced rates for working away
Company van
Company pension scheme
Private medical insurance
28 days’ holiday including bank holidays
Company workwear and PPE
Tools and test equipment
Manufacturer training and ongoing support for individual systems
Support from an experienced operations and technical team
At GreenGenUK, we are committed to creating an inclusive and representative working environment. We know that different experiences, perspectives and backgrounds create a better workplace and a stronger business.
We provide equal opportunities throughout our recruitment process and working environment. Employment decisions are based on experience, skills and suitability for the role.
If you are an experienced engineer who enjoys fault finding, takes pride in delivering excellent customer service and wants to develop within the renewable-heating sector, we would love to hear from you.