My offside rear caliper keeps sticking! I've replaced it twice, the first time with a used unit, the second time with a recon unit from Eurocarparts which is currently on the car now. All is well for a day or two then it starts dragging causing the disc etc to get hot. None of the other discs are dragging, it's just the one wheel so I've discounted it being a faulty servo. A new ABS unit was fitted about 10 months ago so I assume it isn't this (no warning lights on dash) New rear pads were fitted about 6 months ago but this sticking caliper thing has been happening for 2 or 3 weeks. The handbrake is adjusted ok with a bit of free play before it bites.
The brake pedal isn't sagging and therefore cant be lifted to ease the problem.
There are no hissing noises and the brake pedal feels fine as if there wasn't a problem. After about an hour, it cools down and all is well until it randomly starts sticking again!
I'm seriously beginning to despise this bloody car even though it's a cracking car to drive when all is well.
The only thing I haven't changed is the flexi brake pipe btw.
Please can someone, anyone advise what I can do???

Thanks.