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Service a heat pump.
Annual ASHP or GSHP service — refrigerant check, filter clean, controls and performance verify.
✓ Updated May 2026✓ Free quotes✓ Vetted pros
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Filters not changed
Reduces airflow and efficiency. Annual check.
Refrigerant leak
Reduces output dramatically. F-Gas regulations require leak detection.
Condenser coil dirty
Outdoor unit accumulates dirt. Annual cleaning maintains efficiency.
Smart control firmware
Software updates address bugs. Check during service.
Costs & timeline
Know what it costs. Know when it ends.
Indicative UK ranges and what affects price.
Cost range
By job type
Inc. VAT · 2026
Source: NMT quotes
Source: NMT quotes
Standard ASHP annual service1-2 hours
£150–£300
GSHP annual serviceIncludes loop check
£200–£400
Cleaning condenser (outdoor unit)Quarterly recommended
£40–£120
Refrigerant top-upIf needed (rare)
£50–£200
Filter replacementWhere applicable
£20–£80
Service contract annualDiscounted call-outs
£200–£500
!
Quote spread is typically ± 18% — always get 3 quotes.
At a glance
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Annual heat pump service maintains efficiency, ensures safety, and protects manufacturer warranty. Expect to pay £150–£400 for UK heat pump annual service.
What Does the Work Involve?
MCS-certified engineer inspects unit. Outdoor fan motor and condenser cleaned. Refrigerant levels checked (F-Gas regulations). System pressure verified. Heat pump performance tested. Controls inspected. Internal cylinder examined. Manufacturer service log updated.
Typical Costs
| Item | Low (£) | High (£) | Notes |
|---|---|---|---|
| Standard ASHP annual service | 150 | 300 | 1-2 hours |
| GSHP annual service | 200 | 400 | Includes loop check |
| Cleaning condenser (outdoor unit) | 40 | 120 | Quarterly recommended |
| Refrigerant top-up | 50 | 200 | If needed (rare) |
| Filter replacement | 20 | 80 | Where applicable |
| Service contract annual | 200 | 500 | Discounted call-outs |
| Mandatory F-Gas refrigerant check | 0 | 0 | Included in service |
How Long Does It Take?
Standard service: 1.5-3 hours.
DIY or Professional?
F-Gas certified specialist only. Refrigerant work strictly regulated.
Choosing the Right Tradesperson
MCS-certified with manufacturer accreditation. Daikin Approved, Mitsubishi Approved, etc. F-Gas registered.
UK Regulations
F-Gas Regulations 2014: refrigerant work by qualified engineer only. Manufacturer warranty requires annual service typically.
Common Problems
- Filters not changed: Reduces airflow and efficiency. Annual check.
- Refrigerant leak: Reduces output dramatically. F-Gas regulations require leak detection.
- Condenser coil dirty: Outdoor unit accumulates dirt. Annual cleaning maintains efficiency.
- Smart control firmware: Software updates address bugs. Check during service.
Frequently Asked Questions
Annual service essential?
For warranty: yes. For efficiency: yes. Manufacturers require service certificate to honor warranty (typically 5-10 years).
What's F-Gas?
Fluorinated greenhouse gases (refrigerants). Regulated for environmental reasons. Only F-Gas certified engineers can work with refrigerants.
How long does service take?
1.5-3 hours typical. GSHP slightly longer (loop inspection).
Service contract worth it?
£200-£500/year vs £150-£300 single service. Worth it for older systems (regular call-outs). New systems with warranty: ~similar cost.
What if I skip annual service?
Warranty void (especially after year 5). Hidden problems develop. Major repairs cost £000s vs £200-£400 service.
F-Gas leak — how to spot?
Decreased heating output, more frequent compressor cycling, unusual noises. Annual service catches before major.
This guide was written with AI assistance and is intended for general information only. Prices are estimates based on UK averages and may vary by region. Always get at least three quotes and consult a qualified professional before starting any work.
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