---
product_id: 78960582
title: "WebastoController Switch Rheostat Timer 3m Extension harness | 9031988A"
brand: "webasto"
price: "€ 102.92"
currency: EUR
in_stock: true
url: https://www.desertcart.hr/products/78960582-webastocontroller-switch-rheostat-timer-3m-extension-harness-9031988a
store_origin: HR
region: Croatia
---

# WebastoController Switch Rheostat Timer 3m Extension harness | 9031988A

**Brand:** webasto
**Price:** € 102.92
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** WebastoController Switch Rheostat Timer 3m Extension harness | 9031988A by webasto
- **How much does it cost?** € 102.92 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/78960582-webastocontroller-switch-rheostat-timer-3m-extension-harness-9031988a)

## Best For

- webasto enthusiasts

## Why This Product

- Trusted webasto brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

WebastoController Switch Rheostat Timer 3m Extension harness | 9031988A

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Webasto |
| Model Number | 9031988A |
| Colour | Black |
| Package Dimensions | 28.9 x 20.6 x 2.6 cm; 110 g |
| Material | Plastic |
| Item Weight | 110 g |

## Product Details

- **Colour:** Black
- **Brand:** Webasto
- **Material:** Plastic
- **Number of settings:** 1
- **Global Trade Identification Number:** 04054037178030

## Images

![WebastoController Switch Rheostat Timer 3m Extension harness | 9031988A - Image 1](https://m.media-amazon.com/images/I/51xTkuyQxVL.jpg)
![WebastoController Switch Rheostat Timer 3m Extension harness | 9031988A - Image 2](https://m.media-amazon.com/images/I/51mdzgZP3hL.jpg)
![WebastoController Switch Rheostat Timer 3m Extension harness | 9031988A - Image 3](https://m.media-amazon.com/images/I/51QR5lAjVvL.jpg)

## Questions & Answers

**Q: Can you use this as an extension for the existing cable?**
A: this is a genuine Webasto extension harness for the 4 pin controller harness

**Q: I have the airtop 2000 stc - can i connect this cable to rheostat wire to install the multi control hd?**
A: The short answer is 'no'. I'll explain
The Air Top 2000 STC is supplied into the Marketplace with potentially 3 different main wiring harnesses. If your heater was supplied with a main wiring harness with only 1 x 4 pin plug, to which you connected the standard rotary controller as supplied with the heater, then it is NOT possible to fit a Multicontrol controller. The Multicontrol uses a 2nd 4 pin plug that is labelled differently eg. 'Telestart, Thermocall. Diagnostic'
So if your main wiring harness has TWO 4 pin plugs ( the connector plugs look identical but have different coloured cables attached) it may be possible for you to use this extension cable to lengthen the 2nd plug connection to allow it to reach your chosen location for the new controller.
I believe initially you must check your wiring harness before attempting to upgrade to Multicontrol
Thank you for your enquiry
David

## Frequently Bought Together

- Webasto Controller Switch Rheostat Timer 3m Extension harness | 9031988A
- Webasto heater controller rheostat 12v or 24v | 83052B | 1322581A | 5010068A | 82819B
- Webasto Air Top 2000 ST or 2000 STC remote room temperature sensor | 1319842A | 9005004B

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**Shop now:** [https://www.desertcart.hr/products/78960582-webastocontroller-switch-rheostat-timer-3m-extension-harness-9031988a](https://www.desertcart.hr/products/78960582-webastocontroller-switch-rheostat-timer-3m-extension-harness-9031988a)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-02*