I do not know where your water pump or the fuse for it is but...
Once you find the pump, make sure the water line is not vibrating agaist the pump itself or against the wall.
For the air conditioner, you need to set the thermostat fan speed to "AU" or Auto for the fan to work properly. If it is set to low or high, the roof unit comes on to circulate air while furnace is on.
2017 Salem Villa Estate 395RET-
2011 Coachmen Freedom Express 295RLDS- Sold
2015 F-250 FX4