HVAC Condensation Line Clog
#1
09-25-17, 06:28 PM
HVAC Condensation Line Clog
I am having an issue with my HVAC where water is backing up in the condensation line and tripping the float switch. I am assuming that there is a clog somewhere in the condensation drain line. I tried connecting a shopvac to the drain line outside and left it running for around 3 minutes but it did not pull anything out of the line (there was no water in the vac when I disconnected the hose). Could this just be a major clog?
Does anyone have any other ideas?
Does anyone have any other ideas?
#2
09-25-17, 06:34 PM
Group Moderator
Welcome to the forums.
Is there an overflow pan below the air handler where the float switch is
or is it in the drain line ?
A few pictures of your setup there would come in handy.
http://www.doityourself.com/forum/el...-pictures.html
Is there an overflow pan below the air handler where the float switch is
or is it in the drain line ?
A few pictures of your setup there would come in handy.
http://www.doityourself.com/forum/el...-pictures.html
#5
09-25-17, 06:46 PM
Group Moderator
Ok.... so single drain line and float switch is in the upper drain port.
Try removing the cap to the right and see if it's full of water.
Try removing the cap to the right and see if it's full of water.
#6
09-25-17, 06:51 PM
The last time that the float switch tripped, I removed the cap on the pvc T and it was full of water too.
If I pull the float switch out, the AC starts working again and the water drains out of that pipe. Afer a period of time (sometimes hours, sometimes days) it will happen again and the float switch will trip.
If I pull the float switch out, the AC starts working again and the water drains out of that pipe. Afer a period of time (sometimes hours, sometimes days) it will happen again and the float switch will trip.
#8
09-25-17, 09:20 PM
Forum Topic Moderator
Homewerks Worldwide 3/4 in. PVC Sch. 40 Slip x Slip Ball Valve-VBVP40E4B - The Home Depot
That is why I like installing a 3/4 inch ball valve in the drain line.
That is why I like installing a 3/4 inch ball valve in the drain line.
#9
09-25-17, 09:46 PM
Group Moderator
#10
09-25-17, 09:54 PM
Forum Topic Moderator
Thanks,
The second opening that serves as a vent was originally by the T. When the drain backed up the homeowner would get water through the ceiling.
I added the valve , extended the vent and trapped the secondary.
I took the float switch from the secondary opening on the unit and put a float switch on the secondary pan.
No more water through the ceiling.
The second opening that serves as a vent was originally by the T. When the drain backed up the homeowner would get water through the ceiling.
I added the valve , extended the vent and trapped the secondary.
I took the float switch from the secondary opening on the unit and put a float switch on the secondary pan.
No more water through the ceiling.
#11
09-26-17, 03:28 AM
I have seen some youtube videos of folks running a water hose into the drain pipe. Is this a safe option for me with my setup? I don't want to blast water back into the unit.
#12
09-26-17, 11:33 AM
Group Moderator
Look at your setup.
If you put water into the standpipe...... where would it go ?
Towards the unit and towards the drain. So water pressure on that pipe won't work without a valve at the air handler end.
You may need to cut your 3/4" line at a place where you can connect pressure to. The PVC is easily reconnected with a coupler.
If you put water into the standpipe...... where would it go ?
Towards the unit and towards the drain. So water pressure on that pipe won't work without a valve at the air handler end.
You may need to cut your 3/4" line at a place where you can connect pressure to. The PVC is easily reconnected with a coupler.
