Could you please comment on the following situation: (I have searched the forum but could not find a solution that pertains to my system setup).
I have a Trane X19i with XV80 indoor unit, VS motor. The coil has TXV. When the system is in cooling mode - Stage 1, with a low load, ambient temp lower in the evening and mornings, the liquid line makes sloshing/gurgling noise righ at the coil.
When the demand is higher - mid day, the noise is not present (still in Stage 1)
There is no gurgling noise in Stage 2.
I had a tech come out, he added a bit of R22 (while taking pressure readings in Stage 2 only). This helped a bit --- this was done in mid morning with ambient around 95F. However, the noise is still present when the load is low.
I have a second system (two zones), X20i with XC80 and there is no noise on that system.
Thank you in advance for your comments.