I just my a/c regassed (1st time since ive had it) when the a/c is switched on the thermos go into high mode.When the a/c clutch disenguages the thermos go back to low & when the a/c clutch enguages the thermos don't go back on high?
has anyone else noticed this before?
is there some sort of relay timer or something that stuffs up?

The A/C guy says turn it off while stopped or the pressure will build with out enough air flow or she may blow

When the aircon is engaged generally the second thermo will start up for a few minutes, then it will cut back down to slow speed and only pick back up again if needed

This is what it does on my EF anyway

basically what six in a row has said is right the thermo's should go on high when the ac is on and turn off when the ac is off