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How to remove my indoor furnace coil without getting shocked?

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  • Heating & Co... Master
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Just throw the breaker at the house box.

Posted on Feb 13, 2012


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Posted on Jan 02, 2017

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SOURCE: Evcon AC (heat pump) leak in indoor coil

Most refrigerant leaks can be repaired. However, if the leak is between the aluminium fin plates, I would have to agree that it should be replaced. They are correct that you cannot after fifteen years find either an indoor or an outdoor unit seperately and the whole unit would need replacing.

Posted on Aug 11, 2009

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I need to replace my ac but my furnace works fine. Do they need replaced at the...

Think of your air conditioner and furnace as part of a total system. That system will work better, longer and more efficiently if all of its components are matched in capacity and efficiency. By the same token, a mismatched system-one that mixes old technology with new-could decrease system performance and overall comfort.<br />For example, your new air conditioner will be capable of reaching a certain SEER efficiency rating. Because SEER is determined by a complete system combination, if your existing furnace and indoor coil are older or don't match in efficiency and capacity, you might not get the efficiency level you paid for or be able to receive accurate information on what your rating actually is. Plus, an older indoor coil may even be dirty and clogged with particles, meaning more energy will be required to push air through the system.

on Mar 27, 2011 | Heating & Cooling

1 Answer

The outside unit of my Carrier Air Conditioner/Model # 38TG030300 is freezing up the line going to the unit inside.

Is it freezing up at a drier or just a section of tubing? More info would be good. If the line is frosting up all the way back from the indoor to the out door coil, and I guess that we are talking about the suction line, the larger of the two. My guess it either the stat. is set to low below 72 degrees and or the indoor coil is dirty or the filter is. Clean the indoor coil be careful to not get water else where such as into the furnace take appropriate steps to prevent it. All AC units have to have 400 cfm of air flow for each ton of cooling if the do not have this they will freeze up, vents closed off will do the same as a dirty coil.

Jul 02, 2011 | Heating & Cooling

1 Answer

How can i make my air conditioner cool down,

A/C units are all designed for a 20 temp drop and a normal temp. setting is no lower than 72 degrees or the indoor coil will freeze, and this is if everthing is perfect. If the filter is dirty either coils are dirty and I mean clean enough eat off of. The coils have to breath or flow enough to pick up and reject the heat, you should be able to see thru the fins unless the are very tight. Out door coils use a garden hose and nozzle and use as much force as possible and be very methodical, both coils are air filters and get dirty, the indoor coil use a pump up sprayer or a spray bottle, if the coil is over the furnace watch the water so it wont run into it. There could be something going on but if you were to call a service man in he would charge you for this, and them proceed with his service. If the coils are clean you must be using a good filter indoors, or its dirty, clean the coils and use a good pleated filter and keep the coil clean. Hope this helps.

Jul 01, 2011 | Emerson Heating & Cooling

1 Answer

Indoor coil is forming ice what is wrong? filters are clean. is there a way to check refirgerant level?

Generally, there could be one or two things wrong.
It could just be low on refrigerant, which you would have to have a set of guages to check.

The other problem could be that the indoor coil is stopped up with dirt. It if is an upflow system, the coil will be dirty on the under side.This can happen if the unit was ever run without a filter, or if the filter does not fit very well allowing unfiltered air through the indoor coil. If it is a downflow system the coil will be dirty on the upper side.

upflow=ducts in the ceiling
downflow=ducts in the floor

If the coil is dirty:
You can clean your own coil. Its not the easiest thing to do, but you can try cleaning it with an old hair brush or a soft wire brush. Some coils are very hard to get to because you have to take the front panels off the coil. If you have an electric furnace in a closet, sometimes you can look up through the return air to see the under side of the coil.

May 30, 2011 | 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...

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

Aug 01, 2010 | Heating & Cooling

1 Answer

Condensation in the furnace, as a result of which air is not being circulated. Air conditioner is Carrier Model#38CKC036340. Is there any place where I should be removing the condensed water??

The coil for the AC sits above the furnace. Two refrigerant lines enter the
plenum, usually the condensate line is on the same side and at the bottom of the plenum. Sometimes they use pvc pipe or a garden hose to drain the condensate.

Your problem is worse than that, it sounds like your indoor coil is froze up, that is why you dont have airflow, either you have a dirty filter or your fan does not work

Jul 08, 2010 | Heating & Cooling

1 Answer

The coil in my furnace is freezing up. Can to fast of air flow be the cause. My furnace filter is a inexpensive filter. The gas levels are correct.

The temperature difference across the coil should be between 14-21 deg. Temperature taken near filter and
take temperature above the indoor coil. Not enough
air can cause the coil to freeze-up. Has this always

Jun 18, 2010 | Heating & Cooling

1 Answer

Evcon AC (heat pump) leak in indoor coil

Most refrigerant leaks can be repaired. However, if the leak is between the aluminium fin plates, I would have to agree that it should be replaced. They are correct that you cannot after fifteen years find either an indoor or an outdoor unit seperately and the whole unit would need replacing.

Aug 11, 2009 | Heating & Cooling

1 Answer

Compressor of intertherm cond unit MTL-011548BAV shorted. Replaced with 4 ton (48,000) complete cond unit. Now, suction line frost back to compressor with R-22 suction pressure too low (50#). Why? and...

make sure coil and fan are clean and getting good air flow thru the coil and not bypassing it if discharge psi ok air flow problem if high then somthing in unit stopped up some have screens in the liquid line at the coil hope this helps also make sure fan is going the right way! on indoor unit repost psi and temp readings on both lines and indoor and out door temps thanks

Jun 07, 2009 | Heating & Cooling

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