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| Message: | It won't cause any other problems unless the unit starts to leak - some of the pumps have been know to do so. It can be a DIY replacement job - the entire thing comes as single unit and you just have to pinch off the hoses (so they do not leak) then remove them and swap the units. You will have to bleed the whole system again over the next few days. But this problem can also be caused by other issues - like a poor water pump, thermostat, or sensor in the heater system. My thought was that the most likely thing is the water valve or aux pump. Cheers Jim Cash | ||||