Put a screwdriver against the pump and your ear on the other end of it that will tell you if the pump is running. If it is then check the pressure, put it up to about 1.75 and then go and bleed every rad... if that doesnt work then you will most likely have to drain and refill the system as you probably have an airlock - when you had your new boiler fitted did the engineer flush the pipes and rads all round the house because if he didnt then you may as well have not bothered getting a new boiler.
Also when new boilers are fitted then solder can get in the system sometimes and knacker your pump (evident if there is a knocking sound coming from the pump)..... best bet try leaving it all turned off for a couple of hours to go properly cold as I imagine your pump may be red hot..... then fire it back up, put some extra pressure in, check for leaks and then go bleed your rads - there should also be an airlock on the top of the pump try bleeding that too.... good luck chap I had the same problems last year and in the end ripped everything out and re-plumbed it with plastic pipes.
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