First of all there should be some "thumb gum" or permagum around where those lines come up. Expanding foam works but anybody who has to do service will cuss its use there. Secondly it sounds like the drain tube is probably just sticking right down under the home which can cause more than o...

I would think the 17KW would be the most common for that size of home. It is about 57k to 59k btuh heating which was probably what was in that home initially.

Consider that the smallest gas furnace is 56k btuh and that should help.

A number of things can be wrong other than just the capacitor, however it could have had a power surge of some sort and popped it. It's a cheap fix to see if that was the only problem and then have someone check amp draws and voltages that the unit is running and getting. They make a surge protector...

The pressure switches on those are known for "going bad" and it is a part number S1-02541003000. Depending on what city you are in there may be a mobile home supply house that may sell you the switch. Also, there may be a Johnstone Supply that would most likely have the part but may or may...