gurgling from shower (new thread)

If the drain gurgles when the AC is running a possible cause is an AC condensate line that empties into the bathroom drain line.

Oftentimes the condensate line connects to your drain in a bathroom sink cabinet.

Condensate lines frequently clog with mildew and dust. You can try blowing out the condensate line with compressed air.

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Anybody know a simple solution or cause of this?

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if the a/c drain line has no p-trap and its an electric heater, then the a/c unit sucks air from the drain line. that could be sucking water out of the shower p-trap causing the noise.

if gas heat then the unit blows air into the drain line if there is no p-trap. that could be pushing water out of the shower p-trap causing the noise

since you connected the issue to the hvac is running, confirm the main drain line isnt clogged up

im sure its the drain line from it that is causing it, thats why it needs a p-trap on it.

Good information. I'm going to check that out when I get home as well.

You say gurgling, but could it just be the AC drain dripping into the line?

Had a kink of similar problem a while back. My wife was hearing a noise in the master bath, but could not tell where the noise was coming from. She though it might be coming from the attic so I checked.... nothing.

Next day, she still heard the noise. When she turned on the water in the bathtub, the noise stopped. We hardly ever use that tub and the pee trap must not of had any water to seal off the sewer line. She was hearing the air blower going in the septic tank.

This might also be your cause of the noise.