80 Series Air Con Expert Needed !

Hi Neil
This is not a rip it all apart job if it is a genuine factory ac unit
Remove glove box lid
Remove glove box
Unscrew bracket holding the relays
Disconnect pipes under bonnet
Distant memory now, I think there is 6 screws that hold that actual ac unit in. Remove these and the ac unit will slide out leaving the heater and all the ducting still in place.
It is a while ago since I did mine but hope that this is of help
Ray

Dont forget to recover the gas properly then remove the a/c pipes in the engine bay that connect to the evaporater box you will also need to replace the reciever drier if there is a blockage in the tx.

How did he come to the conlusion that the tx is blocked?? what pressures were on the guages and how much gas is in the system??

the biggest misconception is that If the high side is reading high and the low side is reading low that you have a blocked tx valve were the scenario for a blocked tx valve is actualy very low low side possibly vacum and low high side. I would be decomissioning you're system and weighing about 810gms of gas back into the system and seeing what it does then.