Question about Goodman CLQ36AR49 Air Conditioner

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AC not cooling

2 yr old Goodman, 3 ton, 1850 sq ft new house, low side pressure 69, high side 210. Suction line not cool/sweating, air temp out of vent 71. Coil clean.

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  • Mike Squire May 27, 2010

    in order to know for sure add the following: outdoor air temp air temp exiting the outdoor coil indoor air temperature RH indoors RH outdoors Temperature of small line (liquid line) Temperaure of large line (suction line)

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First off you should have a four ton unit. what is your super heat? is it pulling attic or outside air?

Posted on May 28, 2010

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1 Answer

How to measure air conditioning tonnage to square feet of hom


Read size of air conditioner you need , each ton of air conditioning will keep cool 400 square.so higher ton yo pick you feel cool.please read below square feet to ton chart.
1 ton on 400 sq. ft.
2 ton on 800 sq. ft.
3 ton on 2000 sq. ft.
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What are GSC130481AC low and high pressure readings


65to 78 psig on low side 210 to 270 on high side. higher values when house is warm.

May 01, 2014 | Goodman Heating & Cooling

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A/C supply and return plenum is too small. How to I fix it?


that square footage should have 4 tons. rule of thumb 400 sq. ft. per ton. your problem would indicate not enough return that is why it is sucking so much.

Aug 05, 2012 | Goodman Heating & Cooling

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My landlord installed this brand new out of the box. Our apt is 900 sq ft tops. This unit can't even cool down our living room and kitchen. If the whole 2 bedroom apt is 900 sq ft, you can imagine how...


The AC your landlord installed is rated at 8000 btu which is way too small for 900 sq ft. You need at least a 15000 Btu Air conditioner and a 'well insulated' house to be cool.
A good rule of thumb in the AC business says you need 1 ton (12000 btu) of Air conditioning for every 600 sq feet (if the house is well insulated) - if not - then you will need 1 ton (12000 btu) for every 400 sq feet.
So, if you have 900 sq feet and the house is well insulated you should have at least a 15000 btu unit.
If it's not well insulated you will need 24,000 btu.

Jun 07, 2011 | Maytag M6X08F2D Air Conditioner

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I HAVE A NEW AC 2.5 TON GOODMAN, MY HOUSE IS 1600 SF I HAVE 3 BEDROOMS AND TWO ARE CLOLED AND THE VENTS ARE CLOSED TOO, WITH EVERY THING OPEN THE HOUSE WILL ONLY GET TO ABOUT 80-81 % NEW HOUSE WITH LOTS...


Depending on everything working correctly with the system, the problem I see may be the size of the system. 2.5 tons is enough to condition around 1000 sq. ft. At 1600 sq. ft. Of living space, you will need a 3.5 to 4 ton system. Unless it was designed in a way that 2.5 tons would work which i doubt, there would be a problem with the charge of refrigerant or other under lying problems. First I would make sure your system is designed right for your house, check all filters and air flow from the vents. Then you go from there. Q good way to check the charge without equipment to do it, on a warm to hot day the outside copper lines should be sweating and warm to hot air coming from the fan on top of the condenser. It's not the accurate way to do it, but a good check anyways. Hope this helps and good luck!

May 25, 2011 | Goodman CLJ42AR49 Air Conditioner

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I have a Goodman GSC130361DE it is too small for a 2100sq ft home


Well you have a 3 ton system, it might be a tick small depending on windows and insulation in the house. Make sure you set it at one temp and leave it. Zoneing would also help.

Jul 17, 2010 | Goodman CLQ30AR32 Air Conditioner

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Ac won't go down past 78 F while operating the presures are 15/ 150 psi. I think it needs charge. But how much charge what pressure does the low side need to be at?


The temperature outside and pressure chart are needed to accurately determine the proper charge. (temperature pressure charts to calculate heat gain) However the low side of the unit should read around 70 and the high around 210. This is a really broad generalization and I do not recommend you charge your unit just on this info. It will get you close if you are using R-22 and the unit is properly cleaned. A dirty evaporator coil will cause a severe low pressure reading on the low pressure side.

Jun 28, 2010 | Carrier 38CKC036 Air Conditioner

1 Answer

Can I mix brands/tons when installing AC unit to existing coils?


First off - the 'rule of thumb' is 600' per ton of Air Conditioning. In other words your old unit is a 2 ton unit. So - 2 tons x 600' = 1200'. As you can see if you install the 2.5 ton unit - you will be installing a AC that 'could' cool a 1500 sq ft house (2.5 x 600' =1500 sq ft.). Slightly more than what you need; and the 3.5 ton unit is 'way to big,' (3.5 x 600' = 2100 sq ft.).

Note: fyi - many in the AC business will sometimes refer to tonnage in btu's, i.e. 1 ton = 12000 btu - hence a '2 ton unit' can also be referred to as a 24000 btu unit and vice versa.

So... from the above - you can easily see that "2 tons" of Air conditioning is what is required to cool the 'average' home of 1100 sq ft. "roughly speaking."

Note: it is always best to have a professional 'size' your cooling/heating needs.

One of your questions was could you 'mix tonnage?'

The answer is 'usually you don't mix the tonnage of your outside/inside units.' However, professionals sometimes do (mix the tonnage) in certain situations, and installing a 2.5 ton outside unit with an existing 2 ton inside unit is often done, however, there are some 'tech issues' here and - I would "again" recommend that you call a Service Tech to help you with the sizing/mixing of your cooling/heating needs.

hope this has helped

Jun 20, 2010 | Carrier 38CKC036 Air Conditioner

2 Answers

Air not cold enough to cool house


Make sure the outside fan is running. Also check the high side pressure, I assume the 70# is the low side pressure, so you can tell what the compressor is doing. If the fan and compressor are both working, make sure there is good airflow through outdoor coil and check that it is clean. Let me know what you find.

May 17, 2010 | Goodman CLJ24AR32 Air Conditioner

1 Answer

Goodman Condensor cplj48-1 Air handler Modle


It sounds undercharged (needs more refrigerant). Based on the conditions in your post and assuming the indoor humidity is within 20-70% range, your target superheat should be 10degF. Your superheat (assuming you have an R22 system) is far too high. The pressures are not indicating a restriction; therefore, I have to conclude you have a low charge. A low charge will cause a gurgling sound due to the refrigerant in the liquid line is vaporizing prior to reaching the Cap tube at the Air Handler.

I hope you find this information helpful to you moving forward. :-)

May 10, 2010 | Heating & Cooling

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