TOP 5 CAUSES of Mini Split Heat Pump FAILURE!

In this HVAC Training Video, I Discuss the Most Common Reasons for a Mini Split Heat Pump or Air Conditioner to Fail! Make sure that you are EPA 608 certified before handling refrigerants! Supervision is needed by a licensed HVACR Tech while performing tasks as Experience and Apprenticeship garners Wisdom and Safety.

▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
Tools Used In The Video:

▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
Our Related Videos:

▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
Our HVACR Educational Books, E-Books, Workbooks, Cards, Posters, and PowerPoints:

▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
Our HVACR Online Resources!

▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
Tools Used in Our Videos!

Support the Channel by purchasing tools through Tru Tech Tools!
Save 6% at checkout using code "acservicetech"
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
Follow Us On Our Social Media & Podcasting Channels!

▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
⚠️ Disclaimer:
Information in this video is intended for educational purposes only. Any work related to the topics in this video should be performed by licensed technicians or by apprentices under the supervision of licensed technicians. AC Service Tech LLC is not responsible for any possible damages or injuries caused by the use or misuse of any information provided.
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
#hvacr #hvacr #hvacr #hvactrainingvideos #hvactraining #hvactraining101 #acservice #acservicetech #hvactechs #technician #training #airconditioner #airconditioning #charge #checkingthecharge #refrigerant #failure #minisplit #minisplittraining #hvaclife #hvacmaintenance
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
Shop through Amazon! Your purchases through Amazon provide a means for channels such as mine to earn advertising fees from all purchases after clicking through. Prices are the same as normal.

[edlauren]

I am a licensed HVAC/Refrigeration contractor. I love your videos. One of the YouTube channels that makes you to spent your time learning, not just wasting your time. Thank you!

[JE-KNIVES]

I'm a 2nd year apprentice, I don't know what I'd do without your videos 😅

[sirraident]

The last one!
This literally happened to me yesterday. Got called out for a water leak on a Mitsubishi. Cooling with 55'f supply temp before doing anything. Cleaned the clogged filters and evap coil. Also cleaned the drain pan, drain and tested for a fractured drain pan. All looked good so I assumed it was freezing. Turned it back on and now it had 65'f supply air. Went out to the CU (15ft in the air) and found it turning on and off. I thought "okay, cool it probably has a leak and it was indeed freezing." Found the CU turning off around 95psi. No Error codes. I added 1LB 410A to it and got the pressure up to 130psi (super heat was around 4-6'f I think). CU was still turning on and off and my supply temp was still about 65'f. "Why? I thought, and was concerned about the superheat but it should still cool, right?". Called tech support and got humbled 😮‍💨. Well, I guess I overcharged it. Recovered all the gas and weighed in new gas after measuring the liner-set. Now its got a 54'f supply, 112psi suction and I think it about 12'f SH.

I ended up being there all day for a stupid water leak of which, I cant prove a root cause for other than the filters being clogged. All I know is, it wasn't cooling after I cleaned it with the CU turning on and off. Also did a leak search but didn't find anything. I don't work on a lot of mini splits and I just seem to struggle. I have to call tech support almost every time for them. I thought I was doing the right thing by adding the gas and getting it up to 130 like normal.

[obiemains]

been watching for years! Love this channel. We are all getting older and it shows. Today I thought to myself, this is the 'THIS OLD HOUSE' show of HVAC. without the flannel shirts. Thanks for all of the years of teaching and knowledge you share. Been a tech for 5 years, 4 years residential and commercial for a year. I never stop learning thanks to you, Appreciate that! From Houston TX., where summer is 9 months out of the year.

[Stevenowski]

I have retired within the last couple of years after over 40 years of hvac/r work.
I'm glad to see instructors as yourself sharing your knowledge.

Most mini-split systems that I have seen installed are installed too close to the building to allow sufficient air flow, which, as you mentioned, is critical for cooling off circuit boards and heat sinks.
They are also installed without keeping in mind the service technician who has to climb ladders to get to them. Of course, sometimes it is necessary.

Keep up the EXCELLENT work! 👍👍

[craigbraswell]

another note, sometimes, error codes for one problem may lead you to something entirely different. Example, a reversing valve error code can be an indoor thermistor issue, the system may think its heating when in fact it is cooling! In other words, don't think that an error code is always telling you the exact issue.

[scotta]

Really enjoy your videos. I did a DYI back in February of 2013 of a 1.5 ton Gree Mini Split Heat Pump. Mistake I made was bolting it to the side of the House. It came with a 25 foot line set and I needed about 35 feet. So I bolted brackets to the House and the Mini Split is now about 6 feet off the ground. The mounting brackets transmit some noise into the Family room. Bummer. Should have bought a new longer line set! I did the whole install and bought HVAC tools to do it correctly. Bought a quality 5 cfm 2-stage Mastercool vacuum pump. Bought a torque wrench for the fittings. Flaring tools. Used Flare-tite seals on the 4 line set connections. I ran the Vacuum pump all day and got it down to 110 Microns. So here we are 11 years later and the China built Mini Solit works like new. I clean the outdoor unit at least twice a year. Clean the inside unit and filter annually. The seller I bought it from back in 2013 was surprised it has lasted this long. I've installed 2 more units for Friends since. I'll follow your care instructions.

[solankibharat]

Nice information good knowledge in hvac technician

[syedahmed]

I am an HVAC engineer. This is very informative and helpful for the design process (especially for the specifications part). Thank you for your work.

[overthetopcargotrailerjerr]

Craig - big big fan, just bought your mini split book ❤❤❤❤ DAMN ITS GOT GIANT PRINT ...for old blind people ❤❤❤....EXCELENT BUY 10 STARS ...from a 30 year retired building inspector THANK YOU !!😂

[ColossusEternum]

Great video! One more thing I could add with thermistors is to watch for moisture ingression during summer months. I had an obviously bad 10K thermistor(measured around 500-600Ω ) Ordered replacement. When I returned the unit had been off for some time. The thermistor that previously read 500Ω was now reading around 9kΩ @ 75°.
Upon close inspection the wax seal was compromised, and the thermistor was drawing moisture from condensation and this was causing it to move closer to a short(causing the unit to think the thermistor was warmer than it was)
I replaced the thermistor, took it home and submerged it in water for a day. When I began the test it measured completely normal, when I returned home to check it was reading 200Ω and it took weeks for it to dry out and start reading accurately again.

[makeitcold]

Great video Craig, I like the mini splits a lot more in theory than in practice and would only install one in my house attached to a traditional airhandler (which I’m looking to do). I just find the heads to be a junk design

[MattJMT]

Thank you!!! This is the video I was looking for! I own all your books and love all your videos!

[michaelmead]

This guy’s the best. Great video and content as always.

[Rainmaker]

I’d love to recommend these if manufacturers knew how to troubleshoot their own equipment.

[fernandofrancisco]

Thanks for sharing this video and lots of information. You’re the best Craig

[neilafram]

Very good explanation. It's good you displayed the refrigerant used R410A, but need to emphasise that this video is only relevant to A1 class (non-flammable, non-explosive and non-toxic) refrigerants like R410A as some procedures are different (due to the safety of the engineer & of course the user) if the system is charged with A2L flammable🔥 like R32 or worse some are A3 explosive 💥 like R290. Refrigerant safety is as classified by ASHRAE 34 & ISO 817

[MaMa-qhdy]

Thank you Craig. Another GREAT video!!!

[drdickqueso]

This is the main problem with mini splits. The diagnosis and repair is more complicated than traditional split systems. Good luck finding a company that will service or repair a new mini split.

[jonathanraul]

Great video! Thank you once again. Keep up the great work