Hi. Hoping to get an idea od the possible problem here.
I've had the pump and rack replaced recently as there was a bad leak from both.
I drove it yesterday and all seemed fine initailly but after about 10 miles the power steering became stiffer and harder to steer. I then needed to turn at a roundabout and it was physically hard to turn.
I tried it again this morning and same issue. There doesn't appear to be a leak now as the reservoir is still full after both journeys.
It's pretty unpredictable and not safe as you can't judge how much effort is required to turn. As I said it's totally fine on start up but seems to become stiffer as it warms up.
Can anyone advise what could be causing this?