Capacitor Replacement Cost — AC, Heat Pump & More (UK, 2026)
Estimated £150–£400 for a capacitor replacement in the UK, depending on the HVAC system and the exact fault. Built from 7 sourced repair jobs across 3 HVAC types — each row keeps its own sources. Reviewed July 2026.
What a capacitor replacement costs, by HVAC and fault Estimated
Each row is a real sourced repair job whose description matched this part. Parts and total are that job's own national range — follow the problem link to localize it to your area.
| HVAC | Problem | Repair | Parts | Total | DIY |
|---|---|---|---|---|---|
| Central Air Conditioning | Not cooling / blowing warm air | Run/start capacitor replacement | £30–£90 | £150–£400 | DIY possible |
| Central Air Conditioning | Capacitor replacement | Run/start capacitor replacement (standard) | £30–£90 | £150–£400 | DIY possible |
| Central Air Conditioning | Capacitor replacement | Capacitor swap billed as a standard AC repair call-out | £30–£90 | £158–£393 | DIY possible |
| Central Air Conditioning | Short cycling (turns on and off) | Run/start capacitor replacement (weakening capacitor causing rapid cycling) | £30–£90 | £150–£400 | DIY possible |
| Heat Pump | Capacitor replacement | Run/start capacitor replacement | £30–£90 | £150–£400 | DIY possible |
| Ductless Mini-Split | Not cooling | Capacitor replacement (fan runs, compressor won't start) | £40–£120 | £150–£400 | Pro recommended |
| Ductless Mini-Split | Outdoor unit not running | Run/start capacitor replacement | £40–£120 | £150–£400 | Pro recommended |
Base: 1 published national repair-cost guide (full source registry on the methodology page), published rates from 11 UK repair companies · National base ranges — localize any figure on its linked problem page · Reviewed July 2026 · Estimated
Related HVAC cost guides
The full cost guide for each HVAC system a capacitor replacement shows up in:
Estimated national ranges aggregated from the linked problem pages — no per-page localization is applied here. See the methodology for the localization method and named sources.
Reviewed by a Red Seal–certified appliance technician who also holds a Technical Safety BC gas ticket (Gas-C) and an ODS/halocarbon refrigerant ticket (CFC/HCFC/HFC).