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-   -   Replacing all 3 capacitors on A/C units (https://www.irv2.com/forums/f54/replacing-all-3-capacitors-on-a-c-units-347129.html)

Bigd9 06-29-2017 09:42 AM

Quote:

Originally Posted by Playtime III (Post 3673365)
Flashback to autoshop class. Working car engines mounted on stands. Adjusting the timing by twisting the distributor cap while your partner pointed the timing gun at the flywheel. Twisting was fine until I put my other hand on the engine mount stand. I swear I can still taste the metal fillings in my teeth.

Oh those were the days! The wire coming from the coil to the distributer seemed to always be "porous" causing the capacitor charge to leak out into whatever unsuspecting human was leaning over and getting too close to it. I still have a dent in the top of my head when I got zapped by that coil wire and my head shot up and impacted the stupid hood hold down latch pin that looked like a bullet pointing down! Till this day I have a healthy respect for any capacitor.

cruzbill 06-29-2017 10:38 AM

Dometic says to use a VOM set to 500v or higher range. Black to one wire, then touch red lead to other wires one at a time. Don't need a fall from 13' up on an RV roof!

Matfam1 06-29-2017 11:16 AM

As a professional HVAC tech for 25 years... I verify no power to the unit, phase to phase and phase to ground. Then short the caps using pliers or a screwdriver. Replace them one wire at a time. Do not save them as spares, buy a new set of spares if you are worried about it. Capacitors are cheap, compressors and fan motors are not.


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