You need the drier anytime the A/C system has been open for a while. Moisture left in the system when you fill it with gas will freeze and block the small outlet in the restrictor stopping the gas from flowing andso no cooling.
The drier at the front of the O/S wheel arch contains a descicant to remove any water but as soon as the system has been open a while this descicant absorbs all the water it can find and then can do no more.
The best deal I've found on the drier is around £35 from GSF.
The drier at the front of the O/S wheel arch contains a descicant to remove any water but as soon as the system has been open a while this descicant absorbs all the water it can find and then can do no more.
The best deal I've found on the drier is around £35 from GSF.


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