Tips and tricks on how to do an AC Tune-Up with Doug Smiley on #ToolboxTuesday. What do you do differently? What works for you? Comment below.

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27 thoughts on “Tips and Tricks for AC Tune-Ups

  1. NotATory. says:

    Very vaige! #1 when you check voltage on a capacitor you check it across herm and common. #2 it can be very tough to find out what metering device you have because it can be encased in a plenum or in the coil case.

  2. Sean Paul says:

    Gotta clear the drain line on check ups or in my opinion you charged the customer 65 bucks to check out a working AC unit. Basically did nothing of any good. Cleaning the condenser and clearing the drain is about all the good you can do for them.

  3. Darrell Udelhoven says:

    Good explanation.
    A neighbor that bought the north house here on the farm that has extremely low indoor air-flow and also has been low on R-22 refrigerant over many years & never corrected

    So the neighbor called an HVAC contractor, the technician had a digital manifold cage that was showing high superheat and low 1°F sub cooling, and of course the superheat was high because it was flashing gas through the TXV.

    When the sub cooling got to 2°F and the superheat get down to 16° F & he said the unit was overcharged & took the cages off; actually the target SH of the TXV was probably 10° F, and because it was flashing gas through the TXV it was still well above its target SH.

    Nothing was ever said over the years about the extremely low airflow which had been a major problem since the A/C was added to the oil heating system in 2005. Such is the horrible level of HVAC service we have been getting here in SW WI over the many years since the A/C was added.

  4. phoenix HVAC-R says:

    First of all quit referring to these maintenances or check-ups as Tune-ups your misrepresenting what your actually doing, and stop telling these ( especially new ) techs to gauge up to units on check-ups, it’s actually only for diagnostics, if your statics pressures and temp splits are ok, typically your refrigerant pressures are good, check the things that actually could cause damage like restriction in condensate drains and loose electrical connections.

  5. BLKCFII says:

    I have a goodman 3.5 ton condenser about 8 years old. My Carrier "A" coil has been in the home since 1997, when I had it built. What should the coil temp be?

  6. God of the Ox says:

    This video did nothing to visualize the Preventove Maintence aka Tune Up
    … the geneal public dosnt need to know this, as tune ups are quick cash, as long as you are lower then average cost for tune uo to competators to drive business, and the cleaning must be supurb, i also show clients before and after photos so they know the service was done….

  7. Susan A says:

    I found this on the internet and I think it was so well done I had to find it on YouTube to leave a comment.
    I don't know who the gentleman was that did the video but he was very clear and did a great job explaining the process he does and why.
    I'm just learning female homeowner that has an older home.
    Thank you for helping to explain what should be done in a tune up for an AC system and what to look for.
    I know this video is for professionals but an educated consumer is something a single female "needs" to be about everything when we own our own homes. It's sad that most maintenance and repair businesses are not honest with female home owners. The only defense we have is the BBB and educational videos and books so that we know what "should" and "should not" be done. If we don't learn about all the things we need to maintain we will spend money on companies that are dishonest and give us false information. Sometimes they can even do damage such as fires, leaks etc., to our homes if those things are not done properly.
    It's a sad thing that so many people are so dishonest now. They don't care about anything except for their profits.

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