TradeInstaller pricing on every order · Order by 2pm for same-day dispatch

WUNDERSTOCKHeat Pump Parts

UK heat pump spares specialist · Air, ground & water source

Genuine heat pump parts.
Faster repairs.
Zero guesswork.

Compressors, PCBs, pumps, valves and controls for NIBE, Mitsubishi Ecodan, Daikin Altherma, Thermia, Samsung EHS and more – matched to your model and dispatched fast to installers and homeowners across the UK.

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NIBE SparesMitsubishi EcodanCompressorsPumps & CirculatorsValves & Actuators
Part of the weekGround source essentialIn stock
NIBE Circulation Brine Pump (Grundfos)NIBE OEM

NIBE Circulation Brine Pump (Grundfos)

Part no. 818227

Price

£989.99£824.99 ex. VAT
  • Fits NIBE S1155, S1156, S1255 & S1256
  • Predefined commissioning settings
Brands we supply:NIBEMitsubishi ElectricDaikinThermiaSamsungPanasonicESBEGrundfos

Same-Day Dispatch

In-stock parts ordered by 2pm

Genuine OEM Parts

Manufacturer-approved spares

Free Fitment Check

Send us your model & serial no.

Trade Accounts

Installer pricing & priority support

Heat Source
£2,000.00+
£25£1,000£2,000+

Availability & Pricing

29 parts match your criteria

Free tracked UK delivery on orders over £100.00

Genuine OEM#818227

NIBE Circulation Brine Pump (Grundfos)

NIBE · Pumps & Circulation

NIBE Circulation Brine Pump (Grundfos)
GroundWater
In stockNext working day

Price

£989.99
£824.99 ex. VAT
  • Fits NIBE S1155, S1156, S1255 & S1256
  • Predefined commissioning settings
View Part →
Same-day dispatch
Genuine OEM#342396

Thermia Compressor XHV0382P

Thermia · Compressors

Thermia Compressor XHV0382P
GroundWater
Order-in10–15 working days

Price

£1,899.99
£1,583.33 ex. VAT
  • Fits Atlas 18 & Atlas 18 Duo (400V)
  • Factory-matched replacement
View Part →
Sourced to order
Genuine OEM#DB82-07896A

Samsung Assy PCB Inverter

Samsung · PCBs & Electronics

Samsung Assy PCB Inverter
Air
In stockNext working day

Price

£523.59
£436.33 ex. VAT
  • Fits AE120BXYDEG/EU
  • Factory-programmed assembly
View Part →
Same-day dispatch
Genuine OEM#818166

NIBE PCB Expansion Card

NIBE · PCBs & Electronics

NIBE PCB Expansion Card
GroundWater
In stockNext working day

Price

£89.99
£74.99 ex. VAT
  • Fits NIBE F1345 & F1355
  • Plug-in replacement
View Part →
Same-day dispatch
Genuine OEM#S70B29315

Mitsubishi Control PCB

Mitsubishi · PCBs & Electronics

Mitsubishi Control PCB
Air
In stockNext working day

Price

£341.62
£284.68 ex. VAT
  • SAP no. 290385
  • Free fitment check
View Part →
Same-day dispatch
Genuine OEM#718483

NIBE Soft Starter

NIBE · PCBs & Electronics

NIBE Soft Starter
GroundWater
In stockNext working day

Price

£342.74
£285.62 ex. VAT
  • Fits F1345-30/40/60 & F1355-43
  • Reduces compressor start-up current
View Part →
Same-day dispatch
Supersedes DB31-00611D#DB31-00643G

Samsung Fan Motor 95W

Samsung · Fans & Motors

Samsung Fan Motor 95W
Air
In stockNext working day

Price

£173.57
£144.64 ex. VAT
  • 95W, DC 310V
  • Fits AE050RXYDEG/EU
View Part →
Same-day dispatch
Genuine OEM#T7WC00221

Mitsubishi Fan Motor

Mitsubishi · Fans & Motors

Mitsubishi Fan Motor
Air
Order-in15–25 working days

Price

£247.20
£206.00 ex. VAT
  • SAP no. 503727
  • Replaces 279095
View Part →
Sourced to order
Universal fit#12100800

ESBE ARA664 3-Point Actuator 24V

ESBE · Valves & Actuators

ESBE ARA664 3-Point Actuator 24V
AirGroundWater
In stockNext working day

Price

£188.49
£157.08 ex. VAT
  • 6 Nm, 120 s running time
  • Pre-mounted auxiliary switch
View Part →
Same-day dispatch
Complete kit#406054

Mitsubishi Flow Sensor Assembly Kit

Mitsubishi · Sensors & Controls

Mitsubishi Flow Sensor Assembly Kit
Air
In stockNext working day

Price

£249.99
£208.33 ex. VAT
  • Everything for a one-visit fix
  • Sensor, joints, cable & seals
View Part →
Same-day dispatch
Smart control#206495

Thermia Connect Remote Control

Thermia · Sensors & Controls

Thermia Connect Remote Control
AirGround
In stockNext working day

Price

£449.99
£374.99 ex. VAT
  • Wi-Fi or wired connection
  • Magnetic mounting
View Part →
Same-day dispatch
Service item#060893

NIBE Filter G4

NIBE · Tanks & Install

NIBE Filter G4
Air
In stockNext working day

Price

£42.99
£35.83 ex. VAT
  • G4 filter grade
  • Fits ERS 10 & GV-HR ranges
View Part →
Same-day dispatch

Water · Ground · Air

Shop by heat source

Every part is tagged with the systems it serves, so you only see what fits the heat pump in front of you.

Air Source Heat Pump Parts

Fan motors, inverter PCBs, flow sensors, anti-freeze valves and controllers for monobloc and split air-to-water systems.

24 parts availableShop now

Ground Source Heat Pump Parts

Brine pumps, compressors, soft starters and refrigerant components for closed-loop borehole and slinky systems.

16 parts availableShop now

Water Source Heat Pump Parts

Parts for open-loop and lake/river source systems, including circulation pumps, heat exchangers and filter driers.

13 parts availableShop now

Shop by part category

Compressors2 parts · Scroll & inverter compressorsPCBs & Electronics4 parts · Control boards, inverters, soft startersFans & Motors2 parts · Outdoor fan motors & propellersPumps & Circulation3 parts · Brine pumps, circulators, mixing unitsRefrigerant Circuit4 parts · Expansion valves, coils, driers, exchangersValves & Actuators5 parts · Diverting, zone, safety & anti-freezeSensors & Controls4 parts · Sensors, flow kits, controllersTanks & Install5 parts · Vessels, buffers, immersions, hoses

WUNDERSTOCK Part Finder

Which part fits your heat pump?

Pick your make and model range to see matching spares. Not sure? Send us the serial plate photo and we'll confirm the exact part before you order.

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Matched parts

NIBE

5 matching parts

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Delivery checker

How fast can we get it to you?

Enter the site postcode to see delivery times for in-stock parts. Order-in items show their own lead time on each product page.

Same-day dispatch

In-stock orders by 2pm

Tracked courier

Live tracking to site or van

UK-wide

Including Highlands & NI

Installer & trade accounts

Heating engineers, F-Gas contractors and service companies get preferential pricing and priority support.

  • Trade pricing across every brand we stock
  • Credit account terms, subject to approval
  • A named parts specialist for model & serial matching
  • Van-stock and bulk orders for service teams
0800 000 0000 sales@wunderstock.co.uk

Mon–Fri 8am–5:30pm

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We'll source it for you

We list a fraction of what we can supply. Tell us the make, model and serial number and a parts specialist will come back with the right part, price and lead time.

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