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Heat Pump Repair in Leicester

Heat pumps are reliable, but like any heating system they occasionally need attention. This page explains what typically goes wrong, what you can check yourself, and what repairs cost in Leicester.

Last reviewed: 2 October 2026

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An engineer working at a radiator beside a sash window while diagnosing a heating fault

  • Often a quick fix

    tripped breakers, changed settings and blocked filters account for many call-outs — worth checking before you book.

  • Parts, not whole systems

    most repairs replace one component such as a sensor, valve, fan or board, not the heat pump itself.

  • Keep your paperwork

    the MCS certificate and service history decide whether a repair is covered by the manufacturer's warranty.

What usually goes wrong

A heat pump system has five main areas where faults appear. Knowing which one you're dealing with helps you judge how urgent and how costly it's likely to be.

  1. Sensors and controls

    Temperature sensors drift or fail, and controllers can lose settings after a power cut. These produce error codes and odd behaviour but are among the cheapest repairs.

  2. Water-side problems

    Air in the system, low pressure, a blocked magnetic filter or a sticking valve. Older Leicester heating circuits often carry sludge that ends up in the filter, which needs cleaning.

  3. Hot water cylinder

    Leicester's hard Severn Trent water scales the coil over time, slowing reheating. A faulty cylinder sensor or immersion heater can also cause problems.

  4. Outdoor unit

    Fan motors wear, panels loosen and rattle, and leaves or litter can block the coil. In a narrow back yard, also check nothing has been stacked against the unit.

  5. Refrigerant circuit

    Less common on sealed monobloc units, but a slow leak reduces heat output and can cause icing. This work needs an F-Gas certified engineer.

Typical repair costs in Leicester

Expect to pay around £80–£150 for a diagnostic visit. Beyond that:

  • £15–£200 plus labour for sensors, valves and seals
  • £200–£600 plus labour for fan motors, expansion valves and control boards
  • £800–£2,500+ plus labour for a compressor

Warranty may cover parts if the system has had its annual service. If you're on a low income and your heating has failed, it's also worth contacting Leicester City Council about its Warm Homes funding, which can cover low-carbon heating in eligible homes.

Booking a repair

Use the form on our homepage to tell us what's wrong. A local heat pump engineer from our network will be in touch. Include the make and model of your heat pump, any error code, and how long the problem has been going on.

Brands you're likely to find in Leicester homes:

  • Daikin Altherma
  • Vaillant aroTHERM plus
  • Mitsubishi Electric Ecodan
  • Samsung EHS Mono
  • Worcester Bosch
  • Grant Aerona

Leicester areas

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Questions people ask about repairs

What should I check before booking a repair?

Check the heat pump's breaker in the consumer unit and reset it once if it has tripped. Note any error code on the controller. Make sure the system pressure gauge is in its normal range, and check nothing is blocking the outdoor unit. If none of that helps, book a diagnostic visit.

How much does it cost to fix a heat pump in Leicester?

Diagnosis typically costs £80–£150. Minor parts such as sensors and valves are around £15–£200 plus labour; fan motors and control boards around £200–£600; a compressor £800–£2,500 or more. Ask for a written quote before parts are ordered.

Should I repair or replace an old heat pump?

Repair in most cases. Heat pumps typically last 15–20 years and the common faults are in replaceable parts. Replacement is worth considering mainly when the compressor fails on an older system outside warranty. Ask for both figures so you can compare.

My hot water isn't as hot as it was. Is the heat pump failing?

Probably not. In Leicester the usual cause is limescale on the cylinder coil from hard water, or a faulty cylinder sensor. Descaling, and fitting a scale reducer, normally restores performance.

I rent from a private landlord. Who pays for repairs?

Your landlord is responsible for keeping the heating in repair. Report the problem to them in writing with any error code. Council and housing association tenants should contact their landlord's repairs line.

Does a repair affect the grant I received?

No. The Boiler Upgrade Scheme grant isn't affected by later repairs.

Get help with a heat pump fault

Send us the details →

Tell us the make, any error code and what's happening. A local heat pump engineer from our network will be in touch.