Ok it seems the company who changed the expansion valve have realised they have put on 0.5 kg too much which when removed will hopefully explain the "High Pressure Switch (HP)" error.
A couple of further questions I hope you can
me answer.
The bulb connected via a metal cord to the expansion valve is placed on the cold pipe going in on the top of the compressor. The bulb is placed just next to the place on the cold pipe where the smallest pipe on the expansion valve is connected to that cold pipe.
That is the correct placement of the expansion valve right?
Other question is that I have received a quite aggressive bill from the company where a huge part if for 1.5 kg new coolant costing almost 1.900 DKK incl. VAT (about 2.450 SEK).
Is it normal to add new coolant instead of reusing the old coolant?
I imagined that the old coolant would be good enough, so it could be put back after changing the expansion valve?
Even if new coolant is required I feel the price for 1.5 kg new coolant is too high.
Does anybody know how much that would usually cost?