Check this Mach 3 doc: http://www.airxcel.com/docs/default-...e.pdf?sfvrsn=3
It clearly shows a start kit / PTCR device as standard. Maybe try your luck with a second call to tech support. Ask them if the start kit shortens the life of the compressor on their mach3
I decoded the model # of my Mach 3 and it indicated that it had a start kit yet when I took a look I couldn't find it. Mine just has the run and fan capacitors like this guy's: Installing Hard Start Capacitor into my RV Air Conditioner
I did read that motorhome A/C's get the start kit for generator use and trailers don't as it is anticipated that they will be plugged into grid power. I don't know if that is true or not. The Mach 3 is on my travel trailer.
I did a lot of reading on this and don't recalling anyone discussing that a hard start cap shortens the life of the compressor to 2-3 years.
That is worth investigating for sure though. I put an SPP6 - Supco
- in mine but will do some research & take it out if it will shorten the life of the compressor. I doubt that though.
There's a lot of discussion re: SPP6 and the SPP6E out there. I chose the SPP6.