a/c problem

[CorollaBlue]

A YORK A/C, Heater 4 ton 13 SEER, purchased and installed in 2003, MDL#

HIRDO485S06A, has a serious problem.

When started it put out a temperature in the low sixties range (62 ) service tech reported. In the first vent in the house the temperature is also in the low sixties. However after he left the temperature in the house, vent goes into the 70 + area. The house itself takes hours to drop the temperature down to 80. In fact on a really hot 100 + day it never got below 84.

Their response was that the "ducts" are probably plugged up. After that we checked all the in and out vents and they are all about the same out's and in's as it has always been, regarding air flow.

My opinion is that the compressor starts out at a reasonable temperature but the longer it operates the higher the out put temperature. Trying to get the tech out on a hot day while it is in this condition has been ignored (there is a 5 year warranty for all work and services from the local vender).

I intend to measure the compressor out put temperature and the temperature inside the house vents to determine if they both change dramatically, as I suspect they will.

My question is simply, what is the normal range of the output temperature of this particular York A/C, about 5 to 10 minutes and after several hours of operation on a 100 + day.

[cornytheclown]

measure the temperature of the air at the return grille...the big grille that pulls in air.... and at the supply vents that blow out....there should be 18 degrees difference...give or take a couple of degrees.... 18-20 is ideal and it should hold this difference no matter what. You had a dumbass at your house...not a technician....

If they installed it tell them they need to fix it..........

[Stormin Mormon]

As Corny the AC technician mentions,t he cold air blowing out should be 20 degrees or so colder than the warm air returning to the furnace.

I can think of at least a couple reasons this might occur, and all the solutions involve a repairman working on the system.

[CorollaBlue]

What might those couple of reasons be? I need some ideas before I contact a repairman again.

Storm> As Corny the AC technician mentions,t he cold air blowing out should

[udarrell]

The old 10-SEER condenser had a larger compressor BTUH capacity in relationship to the cooling coil than does the 13-SEER. Therefore, with the 13-SEER matched system the coil temps will not be quite as cold at the same airflow rates through it.

If you ran the unit at night when the air temp was too cold the evaporator will drop below the freezing point & it will freeze over. If that was not the cause then it could be leaking down yet, or there might be several other problems.

If the rooms furthermost from the blower are much warmer, then you have an airflow & probable ductwork problem. The system may have numerous things NOT functioning properly that need to be revealed using effective troubleshooting techniques, & then fixed! Well, you might want to give the so-called tech some hard copies of some of my pages. That may or may not help him, some simply refuse to or cannot learn. It is your decision, however, I would not let him near the system again! Read & learn! - udarrell

[udarrell]

That may or may not help him, some simply refuse to or cannot learn. It is your decision, however, I would not let him near the system again! Read & learn! - udarrell

[Stormin Mormon]

Dirty condensor Clog in the freon system some where (often filter drier, or orifice or TXV) Dirty evaporator Low freon

If the compressor is getting too hot, it's very likely dirty condensor.

[Stormin Mormon]

Wouldn't it be the same BTU hours? Seems like the new system might even cool better, cause it's all new clean equipment.

[Tekkie®]

Stormin Mormon posted for all of us... I don't top post - see either inline or at bottom.

Hey Stumpy do you EVER learn? Freon is a trade name. It's refrigerant you are referring to. Can you learn?

[CorollaBlue]

[udarrell]

For cooling, it is better to have both Supply Air & Return Air near or on the ceiling. Low airflow & lack of throw from diffusers compounds the problem when SA & RA are near or at the cooler air floor level!.

- udarrell

[Edwin Pawlowski]

Could you elaborate on this? Why do you want the return high? Would that not hamper, rather than enhance air flow through the room? Is the idea to draw out the warmer air near the ceiling?