Heat Pump Helper
The Heat Pump Helper is a free, independent resource designed to help UK heat pump owners, homeowners considering a heat pump, and installers looking for clear technical explanations.
Use this section to identify your system, understand how it should operate, diagnose common faults, and find accurate explanations of error codes — without sales pressure or manufacturer marketing.
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🔍 Identify Your Heat Pump
Not sure what heat pump or controller you have? Learn how to identify your manufacturer, model range, and controller type correctly.
Identify your system →📟 Error Codes Explained
Clear explanations of heat pump error codes, what they mean, what you can safely check, and when to call an engineer.
View error codes →⚙️ How Heat Pumps Should Work
Learn how a correctly designed heat pump system operates, including flow temperature, weather compensation, defrost cycles, and hot water production.
Learn how they work →Manufacturer & Controller Help
Each manufacturer uses different controllers, fault codes, and system logic. Choose your manufacturer below to access controller guides, error codes, and manuals.
Mitsubishi Ecodan
FTC2, FTC3, FTC4, FTC5 & FTC6 controllers, error codes and setup guidance.
Open Mitsubishi helper →Daikin Altherma
A, B, C Series and Altherma 3 controllers, fault codes and system behaviour.
Open Daikin helper →Vaillant
aroTHERM systems, sensoCOMFORT controllers and Vaillant-specific error logic.
Open Vaillant helper →Samsung
Samsung air source heat pumps, controllers, and diagnostic fault codes.
Open Samsung helper →Other Manufacturers
Worcester Bosch, Midea, Stiebel Eltron and additional UK heat pump brands.
View all manufacturers →Common Problems & Questions
Heat Pump Using Too Much Electricity
Why high bills happen and what usually causes poor performance.
Read guide →Low COP or Poor Efficiency
Understand COP, SCOP and why real-world efficiency often differs.
Read guide →Independent & Honest Guidance
The Heat Pump Helper is written independently of manufacturers and installers. It focuses on how heat pumps should work in real UK homes, why some systems underperform, and how problems are actually diagnosed.
If you’re trying to understand your system — not just reset it — you’re in the right place.
Heat Pump Manufacturers in the UK
Filter by technology type and switch between grid or list view.
- Known for: High reliability & strong installer support.
- Known for: Strong homeowner confidence.
- Known for: Quiet, efficient Altherma systems.
- Known for: Solid performance in UK climates.
- Known for: Quiet operation & engineering quality.
- Known for: Excellent cold-weather efficiency.
- Known for: Very low noise levels.
- Known for: Strong efficiency ratings.
- Known for: Good balance of price & performance.
- Known for: Compact & installer-friendly.
- Known for: Strong installer relationships.
- Known for: Simple, affordable installs.
- Known for: High-temp retrofit capability.
- Known for: Leading ground-source systems.
- Known for: High reliability & longevity.
- Known for: Subscription-style installs.
- Known for: Very competitive pricing.
Filters show brands that offer each technology type: air source (ASHP), ground source (GSHP), air conditioning (AC) and commercial systems.
