HVAC Run Capacitors 2
Loading...
Uploader Comments (DrZarkloff)
All Comments (72)
-
Can u discharge a cap w any screwdeiver
-
looking forward to seeing a video diagnosing bad suction valve r22 heat pump or at least your experince on problems causing high suction pressure like 105 at 100 outside 10 degree split ra v's supply
-
Mathematically if dt was 0, the capacitor current 'i' would be infinite. This is not mathematically possible or physically possible (which is why we can't divide by 0). If dt was very small, it would mean the capacitors energy would be discharged very quickly. This would most likely damage the capacitor, with a loud bang.
-
@allanvandyke more fun, and if dt was 0 it would be i = CdV/0, can't divide anything by 0 AYYYYYYY
-
You definately don't discharge a capacitor with a screwdriver, you will be asking for trouble. The current through a capacitor is i = CdV/dt. Discharging with a screwdriver gives a complete short across the terminals, meaning dt is zero. If dt is zero, the equation makes i very large. In a large capacitor like the one shown, a short circuit across the capacitor discharge all its energy very quickly, possibly exploding. All capacitors should be dischagred slowly.
8 videosRun Capacitors, Start Capacitors, Hard Starts & Soft Starts- 6:14
HVAC Run Capacitors 3by DrZarkloff23,575 views
- 4:22
HVAC Ohming Compressor Windingsby DrZarkloff234,180 views
- 3:17
HVAC Frozen Evaporator Coilsby DrZarkloff137,934 views
- 2:44
HVAC Run Capacitorsby DrZarkloff180,734 views
- 1:46
HowTube: How to Build a Super Capacitor Dragster (Part 2)by Soccerchamp93013,730 views
- 0:07
Replacing Motor Run Capacitor On An AC Unit.....by jobforce38,246 views
- 1:44
Hvac motor start capacitor checkby othoni68,749 views
- 0:38
Wiring From AC Motor To Capacitor...by jobforce48,903 views
- 4:17
AC fan not working - how to repair broken HVAC Run Start Capacitor - air conditionby iesuck34,718 views
- 9:07
HVAC Brazing Skills - Part Iby hackfreehvac51,729 views
- 6:23
HVAC Electric Heat stripsby DrZarkloff50,412 views
- 4:20
how to check a capacitorby 21footxpress277,183 views
- 8:39
HVAC Troubleshooting Electrical Preview 2by waynex249,936 views
- 9:35
Troubleshooting The Heat Pumpby ServiceF1rst137,963 views
- 7:04
HVAC Heat Pumps 2by DrZarkloff85,488 views
- 6:52
how to bench check a central A/C blower motorby 21footxpress110,644 views
- 1:14
Circle-E. HVAC Tech Tip #5by mkhagy24,042 views
- 9:57
Discharging Run Capacitors - Or NOT to discharge? :)by hackfreehvac70,088 views
- 6:20
HVAC Service Call 3by DrZarkloff57,443 views
- 8:13
HVAC Controls 1by DrZarkloff49,430 views
Question DrZ! : I have always replaced caps with matching mfds. However, I was told that I could go up a small amount (like from a 30 mfd to 35 mfd) and all will be ok. What are your thoughts and what would be the affects to the compressor or fan?
javemusic 10 months ago
@javemusic You might be able to get away with going up a little. I wouldn't.
DrZarkloff 10 months ago
good job
metusa666 1 year ago
@metusa666 Thanks.
DrZarkloff 10 months ago
Shouldn't you really use a 20,000 ohm resistor to discharge a capacitor?
70fixitman 1 year ago
@70fixitman You could.
DrZarkloff 1 year ago