HVAC Overloads and Safety Switches Don't Just Fail

[@InsideOfMyOwnMind]

As a consumer, thank you for dedicating your career to improving the trade through good knowledge and training. You are making the world a better place for all of us.

[@faintsmile3279]

this video talks to my soul. unfortunately i have a colleague who is an old timer whos been in business for 50 years and 20 years in this trade and still doesnt know refrigeration basics and he just replaces the entire unit if he has to so a 5minutes job can take up to 5 days instead

[@djfxnc]

Siempre con muy buena informacion para quienes estamos empezando en la Industria 💯👍

[@tobydwyer5602]

Great lessons. Thanks from Western Australia

[@adamradley4407]

Up here in Canada an AC manual reset high side pressure safety switch can trip over winter. Not a failure of the system operation but due to temperature fluctuations over winter while the system is not in use. A quick reset and the system will run fine all summer.

[@survivor-z3t]

Great explanation. No one tech us that very well in the field. Great job as always 👍👌

[@scottallen5182]

Great video Bryan!

[@Stuart68505]

Air at the circulating pump can result in the flow switch opening because the circulator cannot produce water flow if it has air at the impeller.

[@rc5869]

Awesome class thanks for posting these!

[@brianmcdermott2430]

Great video. Thanks Bryan

[@jamesmcevoy1274]

Awesome class thank you

[@channelcatchaser9426]

Great video

[@tjyagalla5652]

I have come across failed open float switch’s due to .. low voltage short .. float switch is rated at 1.25 amp max in a 3 or 5 amp circuit..

[@joeshearer1247]

Yes agree

[@Stuart68505]

If it is a chiller and you bypass the safety flow switch it can result in freezing & breaking the evaporator if other safeties don’t stop the compressor. The low pressure cut out safety switch should stop the compressor if it responds quickly enough to prevent the pipes from freezing. Big compressors may temporarily bypass the low pressure switch on start up and if that bypass stays closed, the low pressure control will not work to open the circuit. This would be a disaster.

[@kevinkrug466]

I want that shirt, when you gonna have that for sale?

[@ralphnabozny8494]

this is fun. I should of been an A/C guy. what about heater boards dirty with dead lizards.

[@joeyjustin6895]

YA THEY DO JUST FAIL. TODAYS SWITCHES ARE MADE TO A MINIMUM SPEC IN. CHINA. AND THEY DO JUST FAIL

[@prestigemechanical3600]

Agree, have run into plenty switches that are defective. The new gas valves Rheem and Richmond use have pilot safety circuits that just fail “ bad valves”

[@newmanair2257]

Ya rarely will a manual reset go bad but the thermal limits can be somewhat common I change 5-10 every winter and the new style high and low pressure switches are a joke they go bad quite often

[@stephwaylonwells3218]

👍

[@muhammadusamakhan5295]

can we bypass any of these switch

[@DOLOONEKRL]

For troubleshooting purposes, sure. Never leave a safety bypassed. It’s a safety for a reason.

[@d3adp94]

If you know the switch and bad and don’t have a new one on you, sure. Then follow back with a switch when you get it. I would also tell the customer what you are doing to the system. Some customer may want you to wait to get part.

[@InsideOfMyOwnMind]

@@d3adp94 tbh I would be that customer. Why risk system/house/life when the part is likely in stock just not on the truck? I probably already waited longer than that for one o' y'all to come out in the first place.

[@_n8787]

@@d3adp94 No... You never bypass a high pressure switch, float switch, any high limit on a furnace or a vaccum switch furnace. Period.

[@d3adp94]

@@_n8787 if you know a low or high pressure switch is bad and not actually going out on either high or low. Why not. It’s 90 degrees outside and the house is 80. You might consider it. Lennox is known for this. I would never by pass a high limit or float or roll out. Condenser, I would.

[@realestateservicessaleshea99]

Fundamentals are fun! Thanks again for the videos! 🍺🍺🍺🥃🥃⛳🎳 Stay safe. Retired (werk'n)keyboard super tech. Wear your safety glasses!