Heat pump tumble dryers are efficient and modern, using lower temperatures to dry clothes. This technology saves energy but also introduces unique repair challenges. Unlike vented or condenser dryers, heat pump systems rely on a refrigeration cycle, which adds complexity.
Common faults specific to heat pump dryers
Because of their design, heat pump dryers often encounter faults not seen in other models. The most frequent issues include:
- Heat pump failure or leakage
- Blocked or dirty evaporator and condenser coils
- Faulty circulation fan
- Sensor malfunctions detecting temperature or humidity
- Control board errors due to moisture or overheating
Even minor lint buildup can affect airflow and efficiency, putting extra strain on the heat pump.
Repair approach
Engineers diagnose heat pump faults by running a full diagnostic cycle. This involves checking the airflow, water reservoir, sensors, and electrical components. Refrigeration circuits are tested, and fans are inspected for blockage or wear.
Many repairs involve replacing sensors or cleaning coils. Heat pump replacements are rarer but significantly more expensive.
Typical UK repair costs
- Sensor replacement: £80 to £150
- Fan or motor replacement: £120 to £220
- Cleaning and coil service: £70 to £120
- Heat pump replacement: £300 to £450
- Control board replacement: £160 to £320
- Call-out fee: £50 to £75
Most repairs excluding full heat pump replacement cost between £90 and £220. Full heat pump repairs are less common and usually only needed after major faults or years of wear.
Signs your heat pump dryer needs repair
Watch out for:
- Clothes remaining damp after a full cycle
- Longer drying times than usual
- Loud or unusual noises
- Smells of overheating
- Error codes on the display
Repair vs replacement
Heat pump dryers are generally worth repairing, especially under 8 years old. Component replacement usually restores full efficiency. Older models with major heat pump faults may be better replaced with modern energy-efficient units.
Compare with our guide: Old Tumble Dryer Repair Costs.
Tips to avoid future faults
- Regularly clean lint filters and condenser coils
- Check airflow and vent paths
- Don’t overload the drum
- Run periodic maintenance cycles if your dryer supports them
Related guides
- Condenser Tumble Dryer Repair Costs
- Tumble Dryer Not Drying Clothes Properly. Repair Costs
- Tumble Dryer Error Codes and Repair Costs
Summary
Heat pump tumble dryers are efficient but require specialist repair knowledge. Most faults are sensor or fan related and relatively inexpensive. Full heat pump replacements are rare but can be costly, so early maintenance and prompt diagnosis are essential.
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