Noise coming from tub. When I turn on the ac or the heater both electric and central. I get a popping sound that seems to come from the drain also some gurgling. When ac or heater are turned off no more noise. This just started this week.

Does your furnace have a condensate drain system on it?

Does your furnace have a condensate drain system on it?

Yes, there is a white drain pipe coming out of the unit leading under the house. House on piers

Check to see if the condensate drain is still draining freely and not backing up, if it's a pump be sure to test the pump.

I would suggest that you check in your blower housing, something could be in the blower and it is that that you hear. Also while the AC is pumping you will hear some noises that sound somewhat like water gurgling.

Check to see if the cindensate drain is still draining freely and not backing up, if its a pump be sure to test the pump.

It is 10:19pm here so I will have to wait till tomorrow to go under the house and check. Thanks for the reply. I will let you know what I found.

it is 10:19pm here so i will have to wait till tomorrow to go under the house and check. thanks for the reply. I will let you know what i found.

I checked the drain and it was clogged. Blew air though and now it is flowing just fine. No more noise!! Thank you very much for your help. I can now sleep at night. Three cheers to you.

Check to see if the cindensate drain is still draining freely and not backing up, if its a pump be sure to test the pump.

I checked the drain and it was clogged. Blew air though and now it is flowing just fine. No more noise!! Thank you very much for your help. I can now sleep at night. Three cheers to you.

Check to see if the cindensate drain is still draining freely and not backing up, if its a pump be sure to test the pump.

All works well now that the pipe is clear. No more noise thanks.

Check to see if the cindensate drain is still draining freely and not backing up, if its a pump be sure to test the pump.

I checked the drain and it was clogged. Blew air though and now it is flowing just fine. No more noise!! Thank you very much for your help. I can now sleep at night. Three cheers to you.

Dontknow, glad it worked out for you, it was my only thought since there is little crossover between drain lines and HVAC. See you, Bob

Dontknow, glad it worked out for you, it was my only thought since there is little crossover between drain lines and HVAC. See ya, Bob

:) smiling. Thanks allot. Will let others about how you solved my problem. Have a great day.