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I have an AC/Furnace downstairs in my basement. The blower is in a pan that is holding water. There is a 3/4 inch pvc pipe coming out of the unit and going into the pump. The pump seems to be pumping water outside of the house, though the water looks very brown in the clear tube. I took the pump apart and cleaned it. I was about to cut the pvc pipe and try to **** it clean with a shop vac when I decided that I really don't know what I'm doing. Is this a problem that is easily fixed?

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A small brush on a string can be pulled through the tubing to loosen up the crud. This tube needs to be cleared for proper draining.
Eric

Posted on Aug 21, 2010

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Drain inside house from a c is over flowing.central air



I am a certified HVAC Technician. I have worked in the field since 1996. I have seen this hundreds of times, if not a thousand times, in the past. Every central air conditioning and heat pump system comes with TWO drain pans, The MAIN drain pan is located within the AIR HANDLER (blower) UNIT, while the EMERGENCY DRAIN PAN is extremely LARGE and sits under the ENTIRE AIR HANDLER (blower) UNIT. The ONLY time water will be INSIDE an EMERGENCY DRAIN PAN is when the MAIN DRAIN PAN condensate drain line is CLOGGED, causing the MAIN DRAIN PAN to overflow. What causes the drains pans OR the drain lines to become clogged is slime and scale from the condensate water as well as debris from within the attic that may have either been blown by the air or may have simply have fallen into the emergency drain pan; or some insects from the out of doors have traveled up into the PVC Drain line and built a nest on the downward side of the P-trap. The P-trap is designed to prevent critters from entering your home through the PVC drain lines. Most CLOGS occur at the P-TRAP location.

The BEST thing to do is:


1. Locate the WHITE PVC drain pipe outside your house and ensure there is NO water draining from it.

2. Locate the same WHITE PVC drain pipe inside your house. You should notice a "TEE" where two WHITE PVC drain pipes merge into ONE WHITE PVC drain pipe.


Follow the below steps, in the order shown:


A. FIRST, find another person to act as your second set of eyes at the end of the WHITE PVC Drain Line that is located outside of your home. That person will be looking for water or debris to EXIT the end of that WHITE PVC DRAIN LINE.


B. SECONDLY, locate the WHITE PVC "P-TRAP" inside your house. It is normally located within a couple to three feet of your indoor air handing (blower) unit.

C. THIRDLY, very gently lift the entire WHITE PVC drain line up in the air as high as you can without breaking it, and slam it down onto the rafters or attic floor or garage floor. You are attempting to dislodge the CLOG within the drain pipe WITHOUT having to actually CUT the PVC and without damaging or breaking the WHITE PVC. Depending on how old the system is, it may or may not be brittle; and it may not take much to damage or break the PVC, which will cause leaks. So, be very careful at this point.


D. Ask the person outside if anything has started to EXIT. You can ALSO usually hear water start to drain if you put your ear up to the drain line. If the person said "NO"and if you don't see the water level getting LOWER in the EMERGENCY drain pan, then REPEAT step "C" above.

E. If the person informs you that there IS water now starting to exit the WHITE PVC DRAIN PIPE, you should then wait until all water has drained from the EMERGENCY DRAIN PAN; and then pour at least 1 quart of BLEACH down that drain, from the EMERGENCY DRAIN PAN exit. The BLEACH will further clear out any SLIME which may be remaining within the "P-TRAP" and will also CLEAN OUT and DISINFECT that drain line.

If the above steps do NOT work for you, then prepare to go into the next LOGICAL phase of your attack. Please NOTE: I am limited to 10,000 characters in my response, so I'll repost additional STEPS in another RESPONSE. Good Luck!!!

Sep 05, 2012 | Goodman CLQ36AR49 Air Conditioner

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Goodman AC drip pan full and the filter is wet


so you used a hose to blow it out but nothing came out? if so the problem is in the piping. you must have 1/4 inch per foot of fall with no sags unless you are using a condensate pump

Sep 03, 2012 | Goodman Heating & Cooling

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Carrier 38TZA036320 evaporator coil


Hello, sounds like a blocked drain line or cracked condensate pan. Try cleaning the drain line first with a wet/dry vac at the outlet of the 3/4 inch pvc line, if this does not help you will need to have the drain pan repaired or replaced.

Jul 04, 2012 | Heating & Cooling

1 Answer

I have 2goodmanGKS9 gas furnaces(propane) installed on 27 Dec 2009. Both units are working. One is in the basement adjacent to the rear outside wall. Lower unit heats about 1200 square feet. Lower...


well lets start with the 2" pvc pipe. that is a combustion air intake it does not put air into the room, i hope. this is a 90% furnace and they should have installed it that way. there should be 2 pipes to the outside the other is combustion gases. the dust problem maybe caused by the air return pulling the air to that room. the bedroom normaly does not get the trafic that the rest of the condo does.so it would not have as much dust.

Feb 10, 2011 | Goodman Heating & Cooling

2 Answers

Where is the float switch on a Goodman GPG12? My heat will not come on and the last 2 times I have called the HVAC guy he said it was the float switch. It is 8 degrees here and I need to get this unit...


Hello, a float switch is used for a condensate pump or humidifier does not have anything really to do with the furnace not sure what the hvac guy is refeering to. If your inducer motor is running but nothing else is happening it is very possible that you pressure switch is open, this could be due to a obstruction in flue pipe, small hose going from inducer to pressure switch is loose, obstructed, or has condensation in it, otr the switch itself is bad. if the inducer is not running you will need to check if you are getting 24 volts between the R and C terminal on the integrated control board if not the transformer is bad if you are then most likely its a issue with the control board.

Feb 10, 2011 | Goodman GMS90703BXA Heater

1 Answer

I have a Weather King AC/Furnace in the attic that's dripping water into the drain pan. When we purchased our new house it came with this unit and it never dripped ater. Now, the water is dripping towards...


I assume it is dripping water when the AC is running. If you look at the attic unit, there should be a PVC pipe running from the unit - probably an insulated PVC pipe. This pipe probably goes across the attic to the edge of the house and drains outside. The drain pan may also have a drain pipe, but the one on the AC unit is the issue, and is probably plugged. Go outside and see if you can locate the AC drain pipe. See if the ground is wet below the pipe and if water is steadily dripping from the pipe (with AC running). If the pipe and ground are dry, the pipe is plugged. If you have a wet/dry vac, try connecting it to the drain pipe outside to see if you can **** the pluggage out. If you can get it clear, water should start dripping out of the pipe. This same thing happened at our house. I decided to cut the pipe in the attic, and add in a PVC isolation valve, tee, and water hose connection with plug, so I can valve out the AC unit from the pipe, remove hose connection plug, and hook up a water hose and flush the line to outside. Lowe's sells all of the PVC pipe fittings. The water pressure from the hose will always flush out the algae and crud to the outside of the house. I can also remove the plug and pour a cup of bleach down the drain pipe every couple of months to keep algae growth in check. I also cut out the trap (u-leg) from pipe in the attic and purchased a ready made trap a Lowes (the contractor who built our house had made a lousy homemade trap). I purchased a few PVC elbows and installed the trap on the drain pipe outside. By the way, our AC drain pipe comes out of our wall outside and drains near our outside unit. Our secondary drain pan drain pipe comes out outside from an eave on the side of the house. I don't know what you drain line looks like (it may have a port to add bleach, or some cleanout provisions, maybe not). If you choose to modify/improve it, then make a sketch of it, go to Lowe's and get the PVC parts you need + PVC pipe primer and cement. PVC cement dries fast. Remember, the pipe must flow downhill from you AC attic unit. You can use a regular wood saw to cut the pipe. I hope this helps you. You need to keep the drain line clear as algae will continue to grow in it. Pouring bleach in the line every month or two helps. You also need to check maybe once a month that the line is draining properly (check to see if dripping outside). You can get some serious water damage to your ceilings if the water backs up and overflows. I discovered that our drain line was plugged just in time as our drain pan drain line was also partially plugged and drain pan was about to overflow.

May 08, 2010 | Weather King 12AJA4201AH Air Conditioner

1 Answer

Trane Heater A/C Airflow Control


i had a similar problem, and a six inch duct and inline booster fan didnt help, the room was just to far away from the furnace and ac. to save energy, i use an oil rad in the winter, and a portable ac in the summer, it works great.my house is a back split, so its a common problem. in the summer, all downstairs dampers should be closed to push the cold air upstairs ,as it will come back down anyway and the basement is cooler as it is. so if you have 4 flores, you close the bottom 2. bungalow you close the basement

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1 Answer

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If you are referring to the secondary pan there could be a problem with your drain line.i would find the drain at the exterior of your home and **** it out with a wet vac..most A.H.Us have float switches or moisture sensors.They will shut down the unit if the drain clogs.

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You had the condensate from the furnace come loose look for a pvc pipe coming off the furnace it drains the high efficiency heater. I would really check out your hot water heater too.

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