Basic preventative maintenance 

At church this past Saturday the unit started squealing. Because I watched one of your videos I knew how to diagnose it. I knew to take the belt off and let the motor run to see if it was indeed making the noise. If not then to check the bearing play on the squirrel cage. I didn’t get to do it but at least I knew where to start. I’ve always enjoyed problem solving and so far have been able to repair my own a/c anytime something happened. A lot of times things you learn help somewhere else in life. My wife always wonders why I watch so many different types of videos, that’s why.

Useful and helpful yet again thanks

Hi brother or friend. I just found your channel and videos. I really like them and you get a new subscriber. Greetings

Very cool,thanks for the walk thru on the roof. We are still upper 80s overnight in late September with an eye over the shoulder for hurricanes, but looking forward to your pre-winter heating checkup follow thru. Gracias!

Remove contactor covers and inspect the points. Check the wires on the disconnect. Now on the line voltage connection of the transformer. The biggest problem I found was on a call for heat. The transformer was hooked up like that one with 208v to the unit and the factory hooked it to the 230v connection. The electric heat would run for just a couple minutes and cycle off. The thermostat was set to 90 and it was about 40 degrees in the space. It had an old mercury thermostat. The low control voltage was over heating the heat anticipator so the stat would satisfy. Then cool down in the 40 degree room rather quickly and cycle the heat back on. Took me a while to figure this out. On a 20 degree roof and a frozen brain things go slow lol. Not many of those stats around anymore. I don’t know if they teach about heat anticipators any more.

Great job!

Great job.

just learning, by taking using your return temp that could be used as your wet bulb temp, if you had to put on your gauge set, good video just found it

Great video

Another great video.. Like the comment on pressures.. Could be looking for trouble.. Unless its required per a realtor on a inspection ,before selling home.. Thx again! Bryan Tyler Refrigeration

i like ur videos. u make very good videos

Im curious, how do you do coil repairs when you have a condensing coil with a hot gas line that rubbed threw where it passes threw the metal tube sheet?

Thank you so much for this I’ve just recently got into Commercial HVac and I’ve been kinda lost doing these PM’s

Very informative

Super

hey i do the same capacitors under load the same way 👍👍

Please do some troubleshooting of the circuit boards.

How often do you find problems during PMs? Of course it varies, but is one in ten, almost every time, or something else.

12:15 exhaust is close to the gas pipe, is it really safe?

When you been in the trade as long as I have , you get a equally long list of things not to do. I have had bosses who insisted on us using a co2 to blow out the control compartment of cob webs and dust, this was from an experience he had when a tech did a PM and the facilities guy opened the panel after him and seen it full of cob webs and concluded no PM was done. Blowing the control compartment out with CO2 can be a good idea but the problem is that if you are too close to the components or if its just too strong you can blow the springs out of the contactors and not notice. I have done this myself and its fine until it pulls in then its locked in and will not shut off. so, in short, you can actually cause damage if you mess with the unit too much. When checking charge on a Lennox with 4 compressors in a row , you notice the first compressor under charged and the last one over charged, because tech putting gauges on every summer and taking the charge from the first one and dumping it in the next because they don't dump the gauge charge back in when removing gauges.

Badass

Great video,professional explanation,,,,,,I have litle question,,,,somthimes,,do you come cross whit the ICM 220 relays lock out ? How do you deal whit it,,,.?

LOL common sense school love your vids

prefect

hey, what's your opinion on micro channel coils. I'm not a big fan, but would like to see what you think of them. no rush on reply

Here in Indiana I’ve always been told outdoor units have to have a freeze plug in the trap to prevent the trap from breaking in freezing weather. Do you guys not use those or does it not really matter? Love the videos, very informative. Keep up the good work

When your hat sticks to the fan on the top it’s probably about 200 cfm. 😂

Lloked like it had a surveyor ems system

All that and you never changed any filters in the store or checked CFM

How long does it take you to complete the maintenance?