Genuine Vaillant 0020266328 Cooling Resistor / Code Plug

Enables the cooling function on compatible Vaillant aroTHERM / VWL heat pump systems

Genuine Vaillant Part New & Unused Fast UK Dispatch 30-Day Returns

What This Part Does

This genuine Vaillant coding resistor, also known as a code plug, is read by the Vaillant control electronics when the system powers up.

When fitted to a compatible system, it allows the heat pump controls to recognise that the cooling function is authorised and available for installer-level configuration.

Without the correct coding plug fitted, the cooling option may remain hidden or unavailable in the installer menu. With the correct part fitted, a competent installer can configure cooling function settings, flow temperatures, protection settings, and control behaviour.

Important — Cooling Needs Correct System Design

This part enables the cooling function in the controls. It does not, by itself, turn a heating-only system into a complete air-conditioning system.

Standard radiators are normally designed for heating. Running cold water through unsuitable emitters can cause condensation. Effective cooling normally requires suitable emitters, correct controls, condensate management, and dew-point protection.

Part Number Information

This listing is for the Vaillant cooling coding resistor supplied as:

0020266328 Actual plug supplied with this listing
0020269259 Newer documented part number — same functional cooling coding plug

Compatible Systems

Commonly associated with compatible Vaillant aroTHERM Plus / VWL heat pump installations, including:

Vaillant aroTHERM Plus Model VWL Reference
3.5 kW VWL 35/6
5 kW VWL 55/6
7 kW VWL 75/6
10 kW VWL 105/6
12 kW VWL 125/6

Also associated with some compatible aroTHERM Split installations.

Please confirm compatibility before purchase. Suitability depends on the exact appliance, controls, firmware, regional configuration, and system design. If unsure, ask a Vaillant-approved or competent heat pump installer to confirm before buying.

What You Receive

  • 1 × genuine Vaillant 0020266328 cooling resistor / code plug
  • New and unused item
  • Supplied in Vaillant small-parts packaging
  • Carefully packed for postage
  • Dispatched from Widnes, North West, United Kingdom

Please Read Before Buying

  • The coding plug enables the cooling menu/function where supported.
  • Cooling must be configured correctly at installer level.
  • Heating-only emitters such as radiators are not normally suitable for useful cooling.
  • Incorrect cooling setup can cause condensation on cold surfaces.
  • Buyer is responsible for confirming suitability for their own system.

Fast Dispatch

  • Orders paid before 16:00 Monday to Friday & 12:00 Saturday are dispatched the same working day.
  • Dispatched from Widnes, in the North West, United Kingdom.
  • Delivery service and estimated delivery time are shown by eBay at checkout.
  • International postage available where shown in the postage section.

Returns

  • 30-day returns accepted on unopened, unused items.
  • Buyer pays return postage.
  • Please check compatibility before fitting or opening the item.

Buy With Confidence

Genuine Vaillant spare part, carefully packed, with fast UK dispatch.

Independent seller. Vaillant is a registered trademark of its respective owner. This listing is for a genuine Vaillant spare part and is not an official Vaillant listing, dealership, or endorsement.