The water pump has packed up on our swift suntor 580pr motorhome. well it actually just keeps running , makes a swishing sound and only spurts sporadically form the tap. The problem has been caused by a small amount of residual water remaining in the pump after draining down , this then freezes. seems like the best advice is to run the pump until dry when draining down. we always drain down fully , remove the plug in the fresh water tank and drown down the boiler as well as pumping any remaining water out of the system thropugh the taps. Our engineer is real busy, so is this a job easily fixed by replacing the pump, ie would it be a DIY proposition? can see the pump under the seating easily accessible and only held in place by four srews with water in and out screw connections. what do you think , has anyone done this? The motorhome is a 2008 model.