Nh t7 lift arms error

[Ormond]

T7 200, lift arms have stopped working on the rocker switch and the slide position control. It will lower and raise by the blister buttons and the outside mudguard buttons. Lift position reading is 59 even when lift arms in the top raised position. Any ideas? Thanks in advance

 

[traadilooar]

It has lost calibration, disconnect hitch rods turn all linkage dials full clockwise, hold either linkage up or down (I forget which try both) start tractor press up linkage should raise fully then drop a bit, then press lower.
When finished restart tractor check works refit and adjust hitch rods

 

[Blue.]

Potentiometer may have sheared the pin or failed,if the potentiometer doesn’t move your arms will only work with the fender buttons.

 

[Bumble Bee]

Check the wiring from the armrest. We've had issues with broken wires in the past.

 

[Fraserb]

We had one where the linkage for the potentiometer had came off, clipped it back on and away we went.

 

[ARW]

When you start our t7 the arms go right up to the top for a few seconds then down again, you can stop it by holding the rocker switch down, I’ve calibrated it but after a few days it starts doing it again
Any thoughts?