newtonbury
New member
- Joined
- Nov 1, 2012
- Messages
- 1
- Tractor
- CASE MX285 Massey 135,JD 6800,JCB 3CX,VALMET 6050,SAME 160 TITAN ,SEVERAL OLD NUFFIELDS ,IH TD9 1949,IH FARMALL 1947 WITH P3 CONVERSION , DEUTZ DX4 70
Hi All !I've got a problem with friends JD 6920 aircon .It has a new compressor ,dryer & expansion valve, it's been thoroughly flushed using a solvent flushing fluid,has no obvious blockages - all screens are clear but within a minute or less after starting it will freeze the suction hose.
Initial running pressures are fine at 2bar low - 10bar high but once it freezes it drops to <1bar low 6bar high and thaws intermittently then runs for short time until it freezes again.Should I be looking to change the thermostat control or the low/high pressure sensor/switch on the high pressure line before the evaporator ? Any suggestions would welcome !
Initial running pressures are fine at 2bar low - 10bar high but once it freezes it drops to <1bar low 6bar high and thaws intermittently then runs for short time until it freezes again.Should I be looking to change the thermostat control or the low/high pressure sensor/switch on the high pressure line before the evaporator ? Any suggestions would welcome !