u/TallerWaldo

Hey everyone, looking for a technical opinion on a sound my Inverter AC is making.

The Context:

The new unit was installed last winter, but the tech just "purged" the lines instead of vacuuming. I complained, so they eventually came back, did a nitrogen flush, and then vacuumed it. Temperature differential was around 12°C–14°C (NOTE: I don't think they replaced the refrigerant even though they told me they would do it).

Current Performance 7 months later during Summers:

Cooling: It’s cooling fine. The room eventually cools down fine and a tech recently inspected that Amperage was in range.
The Sound: I’m hearing a steady "blowing/bubbling/gurgling" sound behind the compressor vibration (turbulent refrigerant flow?)

The Question:

Is this gurgling sound typical for an inverter unit modulating at lower frequencies, or is it a sign of an issue or residual contamination from the bad initial install?

I’m less worried about the efficiency and more concerned about the longevity of the compressor.

If this is an issue, what are the things that I should request the HVAC tech to objectively confirm this issue (otherwise sound is subjective 🤔). Should I push for a full refrigerant recovery and fresh re-gas to be safe, or are just Delta T and refrigerant pressure checks enough?

Thanks in advance!

Trying to decide between the Panasonic and Daikin for a 1.5T 3 star inverter split AC.

Panasonic seems much more feature-rich with WiFi, slightly higher cooling capacity, air CFM, higher marketed 55°C ambient temperatures.

Cons, Only 2 way swing, the Outdoor unit is much lighter and smaller giving me reliability concerns.

Thought about the 6 year comprehensive warranty offered for 499/- but even that is full of asterisks, no labour charges covered and it's required to get 2 maintenance services per year from Panasonic itself. Kinda makes it an AMC imo

Daikin I've more experience with older models at home which are still going strong, it seems more focused on strong cooling and reliability, but have seen the newer models go down in quality.

- No features like in Panasonic

- Slightly lower cooling capacity and cfm

- Lower advertised ambient operating temperatures (52°C)

- Quieter operation

- 4 way swing

- Heavy Duty ODU, with Daikin compressor

Good part is that I'm also getting 5 year comprehensive warranty for free here (labour and gas charging included) and there's no yearly maintenance service required. So strong reliability for 5 years

For people who’ve purchase recent Panasonic/Daikin models, what would you recommend?

- Is Daikin actually meaningfully more reliable?

- Or are modern Panasonic inverter ACs broadly comparable now?

- Is Daikin’s premium image just brand perception at this point?

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R32 Mini Split Inverter AC Gurgling/Bubbling Sound – Normal or "Purge" Install Damage?

Trying to decide between the Panasonic and Daikin for a 1.5T 3 star inverter split AC