Renault Clio 2003 Brakes locking

[claire43]

Ive recently passed my test and have got a clio. It seemed in a good condition but I took it into a garage to have it checked over and they changed the brake pads. It was fine for several weeks but 3 or 4 times recently the brake feels like theres a brick under it when I press it ands doesnt respond at all but if I press it again seconds later its fine. This scared the life out of me but thankfully I wasnt going too fast at the time and was able to slow down safely. I took it to the garage and they took it for a test drive and the same thing happened whilst they were driving. They put it on some machine and said I needed a new sensor. I had the work done and drove the car for a couple of days with no problem until today when it happened again. Before I pay more money which I dont have (being a student) any ideas of what may be causing this?

[AlBags]

Claire hi
You really need to take back and let them take another look and fix.
Diagnostic plug-in will store, and make available the stored faults/fault codes so they should be able to tell what's going on.

[Toureman]

If they renewed an abs sensor the faulty one would not cause the brakes to not work,

Take it back to have it repaired properly.

[TWR]

Hi Claire, there are Garages that open the brake fluid bleed valve to release brake pad pressure to remove them, but this can be done without what I have mentioned, it sounds from what you have said that there is air in the braking system that requires bleeding, it's the garage's job to sort out the problem I take it the brakes where right apart from them getting changed? this sensor to me sounds like a money making thing from a female ( Do not be offended by that statement) also on a point of new brake pads when I change pads I always take the car out to Bed the brakes in but I doubt they will have done that, take the car back & explain your problem but DO NOT PAY ANY MONEY the problem lies with them.

[AlBags]

Look ... When you get air in the brake lines, you get a spongy pedal with a lot of travel, or it goes straight to the floor easily. You do not get a pedal like a brick symptom.
There is probably a fault within the ABS unit. I feel for Claire because these are expensive. She would have to get a 2nd hand one.
Go back with it Claire.