---
title: COL (block cooling)
description: "![](https://faqdoc.info/wp-content/uploads/2026/01/Matrix_55__Icon_wasser.png) Usecase:bathrooms When this function is active, the controller does not switch to cooling mode, even if a CO signal is connected. Prerequisite for use: - Heating type WH set in the menu → [WEH](https://faqdoc.info/en/systemauswahl/alpha-direct-en/55-matrix/weh/)"
url: "https://faqdoc.info/en/systemauswahl/alpha-direct-en/alpha-direct-thermostat-55-matrix/ant-col/"
updated: "2026-09-30"
category: Alpha direct thermostat 55 Matrix
---

# COL (block cooling)

![](https://faqdoc.info/wp-content/uploads/2026/01/Matrix_55__Icon_wasser.png)

Usecase:bathrooms

When this function is active, the controller does not switch to cooling mode, even if a CO signal is connected.

Prerequisite for use:

- Heating type WH set in the menu → [WEH](https://faqdoc.info/en/systemauswahl/alpha-direct-en/55-matrix/weh/)