Yorkshire · Teesside · County Durham · North East
Goldridge guide

Why is my air conditioning not cooling?

A system that is not cooling can have a simple control issue or a fault that needs an engineer. Start with safe checks that do not involve opening the unit, refrigerant work or electrical testing.

Last reviewed · October 2026

Safe checks first

Confirm the controller is set to cooling mode, the target temperature is below the current room temperature and that accessible filters are not obviously blocked.

  • Check cooling mode is selected
  • Lower the set temperature sensibly
  • Check accessible filters
  • Look for an error code
  • Note whether the indoor fan and outdoor unit appear to run

When to request help

If those checks do not resolve the problem, or the unit is leaking, repeatedly stopping or showing an error, request repair help rather than dismantling equipment yourself.

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