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03-17-2012, 02:19 PM #1
Bypassing Hi/Low pressure cut offs
We should all know better when it comes to bypassing safety switches in heat except for on site diagnostics. Or motor overloads.
What about high and low pressure cut offs in cooling when the accompanying pressures are normal and the cut offs are tripping?
I guess another way to pose the question would be this: Is there any condition that would trip a cut off that you would not be able to detect by system pressures?
Appreciate any consideration,
03-17-2012, 02:53 PM #2
It's tempting to do but I don't think it's worth jumping one out. I don't like to have "what if's" bouncing around my head when I'm home. Things could look ok when you're there, but anything can happen. Say you jump out the the pressure switch that's open even though the systems running @ 250. Then you leave, and the condenser fan dies. Uh-oh. Not worth the risk.
03-17-2012, 03:15 PM #3
03-17-2012, 06:25 PM #4Regular Guest
- Join Date
- Feb 2012
- Upstate SC
They sell low end equipment without those safety switches, but I agree with the other posters. You need to restore the customer's equipment to its normal working condition. I have done it to give some temporary relief until I could I could get back and do it right.
03-17-2012, 08:42 PM #5
really, whats the worst thing that could happen..comp will trip overload or the breaker...worse case your comp will plow the internall relief or if its a bigger system blow the relief and there goes a few hundred lbs.....doubt its gonna hurt anyone not like jumpin a limit on a gas fired appliance
still not reccomended by me, but i doubt its gonna hurt anyone
03-17-2012, 10:27 PM #6
03-18-2012, 08:50 AM #7
03-18-2012, 09:57 AM #8
Yesterday, I had my first "no ac" call of the season.
Compressor not running. Good standing pressure, but low side cutout open.
I jumped it out just long enough to find out why it failed. Poor aiflow has been causing the unit to cycle on the switch, until it gave up. In commercial, we quote all proposed repairs first, a process that takes an aproval from the store corporate.
Leaving that switch out and running the unit would not have been a professional repair.
03-18-2012, 10:10 AM #9
03-18-2012, 10:56 AM #10
03-18-2012, 11:35 AM #11
03-18-2012, 11:39 AM #12
03-18-2012, 11:41 AM #13