Water constantly is released from my furnace (boiler)

If your pressure relieve valve leaks it means one of 3 things: your water is too hot or you have too much pressure in your plumbing system. Lastly, it can be faulty T&P valve.

Water constantly is released from my furnace (boiler)

Could you be more explicit? What's leaking? From where? More details please. Tom

Yes, more precise decription would help. If it is the t/p valve that is leaking, Milo hit the bases. It could also be cuased by a faulty expansion tank, which would cause the pressure to rise to high when boiler heats up.