Yeh, i'm quite happy for them to do it. Waiting on a relay for a friends 58 plate Honda civic to see if that cures their intermittent blowing hot cold air sometimes.Works for ten minutes or so then spits the dummy out. Then it works again, been topped up twice. I wasn't there to see what pressure it was filled to the the first instance. The second time he drained and completely filled it again. It was 2 days between the rill refill. I suppose we could have seen from the numbers that there could be a leak, if we knew them.
With the known problem on the air compressor unit i'm more than happy to keep the warranty intact.