Question about Heating & Cooling

1 Answer

My daughter has a Bryant AC Model number 563AN048-A where the outside coils are freezing up. The repairman has been out twice and has cleaned the coils on the inside and outside units and has checked the coolant levels that he says are ok. Currently, if they remove the cold air return filter, air circulation is increased slightly and in doing so, the outside coil is not freezing. Can't run the system without a filter as the internal coil will clog. Any suggestions would be appreciated. Associated furnace is gas furnace Model number 398AAV048080; Series A

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 1,515 Answers

Hi, this is a 4 ton unit, Bryant are top of the line, I believe so as I have worked on them for so many years. They were Day & night, just a name change is all. Here is what sounds like your problem is, or is your problem. Did the tech check the TD of the supply air and return air? This is the temperature difference. There should be a TD of 18*f to 25* TD or temperature split. Example is, if the supply is 56*, the return at the filter should be at around 76* which is a 20* TD. If the outdoor condenser started to defrost when you removed the filter, you were getting more return air through the evaporator coil. This tells me that your return air duct has either come loose, has a large hole or holes in it, or if you had a repairman under the house or in the attic where ever the duct work is, has flattened it, and you are not getting enough return air back through the evaporator coil. This will cause the condenser coil to ice up quite fast. When you remove the filter and panel, you should feel a pulling almost like a magnet as the return air will be a strong force. This is your problem if all coils are clean and the system is charged properly, this is the only way the outdoor coil will ice in the summer. If the indoor coil were dirty, or low on freon, the indoor unit would be the coil with the ice build up. You say the air increased slightly, and the outdoor coil started to defrost. The problem is the return air 18" duct is either crushed, Holes from pests, or has come lose at some point. This is all it could be, mark my word!! Have it checked, or if you are able to check it, you can maybe hear it where ever it was put in, up, or down under. Find it, and you will increase the CFM by 50% depending on the leak. Please keep me posted on this and when you rate me be kind as I know you will. Trust me, this is your problem. Please keep me updated by my user name below.
A/C, Heating, & Refrigeration Contractor

Posted on Aug 01, 2010

Testimonial: "Good common sense response. I will pass the information along. Thanks."

  • Robert Horton
    Robert Horton Aug 02, 2010

    Thank you for the awesome rating. Get them back out free of charge to go through the duct work and get this piece of equipment some air to breath. I am happy to help.



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

Model numbers for Bryant AC difference between a model pa4zna048 & a rspma48

The difference is the sticker on the outside of the unit and the slightly higher price for parts on the Bryant. Go with the Rheem but don't be mad at me when it breaks down, the Bryant will too. Honestly it's luck!!!

If you need further help, reach me via phone at

Aug 30, 2017 | Bryant Heating & Cooling

1 Answer

We have a Goodman AC Unit and the pipe continues to freeze.

either the inside coil is dirty or system is overcharged.

May 14, 2014 | Goodman CLQ36AR49 Air Conditioner

1 Answer

Furnace blowing warm air, ac overheats

Sounds like it is tripping on it's high pressure switch. This could be caused by a dirty condenser coil, overcharge of refrigerant, or non condensables in the system ( air most likely). I would get a second opinion from a repuatable company, sounds like he's trying to rip you off.

Sep 25, 2012 | Bryant Heating & Cooling

1 Answer

I keep getting water leaking out of my bryant heat pump (indoor unit) in the summer when the wheather is very hot and humid for a long time. I suspect there is too much ice buildup and it is dripping...

If it is freezing up then it is for sure dripping outside the catch pan.. Have you been able to take the front cover off and see ice on the coil.... ?

Aug 20, 2010 | Bryant 463AAC005BA Air Conditioner

1 Answer


First check your air filters and make sure the inside and outside coil are clean. If they are clean and you are getting good air flow over the coils then you probably will have to get the unit charged.

May 03, 2010 | DeLonghi Trane 5t Rooftop Air Conditioner...

2 Answers

My outside air conditioning unit keeps starting for a few seconds, then stops, then starts again and then turns on. The house is cool but it keeps doing this all of the time.

Constant starting is going to run up your electric bill a lot. Have the unit checked out by a professional repairman. It could be as simple as a weak relay, or your outside coils could need cleaning. Definately check the inside coils, there are coil cleaning sprays that will clean them good.

May 08, 2009 | Heating & Cooling

2 Answers

Air condition freezing up

Make sure the condensate drain is clean and clear of any debris. With the indoor unit off, Remove the inspection panel and pour a gallon mixture of 10% Bleach to Water solution in the drain pan. Do not overflow the pan but check to make sure there is flow to the outside or drain. Clean out the drain hose if you have to. A freezing coil is a sign of either not enough air going across it or not enough charge in the system. Check to make sure all of the return air vents as well as supply vents are in full open and unrestricted. If they are, you will need to have the charge checked. If this turns out good, have your technician install an anti-freeze kit. This kit will temporarly turn off the compressor unit for a short period when the sensor in the kit experiences a freezing condition. Then after a bit, it will turn on the compressor. It may not cool as much as it was, but it may get you thru. Good Luck!

Sep 14, 2007 | Heating & Cooling

Not finding what you are looking for?
Heating & Cooling Logo

Related Topics:

238 people viewed this question

Ask a Question

Usually answered in minutes!

Top Heating & Cooling Experts

Paul Carew

Level 3 Expert

3328 Answers

Tim Whalen

Level 3 Expert

3074 Answers


Level 3 Expert

81400 Answers

Are you a Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides