The heaters in my Z dont feel like they are heating up to what they should do at the given temperature.

 

I haven't tested it with a thermometer but can anyone tell me if it is the matrix that would need changing to sort this or would the A/C need regassing(or is that just so it goes cold when you want it to)?

This would be something to do with the heater matrix, like the valve not working, or one of the control flaps not moving or air trapped in the matrix etc.

 

The gas in the a/c is only for cooling.

Thanks Andy.