Central Air Conditioner Is Cooling Intermittently.

by Joe
(Sacramento, CA)

I purchased a foreclosure home 9 months ago. The central air conditioner is a 3 ton York unit split type. House & A/C is 5 years old but has 3.5 years of use on it as house has been vacant for 1.5 years due to foreclosure.


When we first fired up the central air conditioner, the condenser fan was making a racket and barely spinning. We called our home warranty company and they had a hvac company come out. The tech replaced the fan and checked the Freon and left. It seemed to work fine.

Ever since then though, the central air conditioner blows cold only intermittently. Outside condenser coils are fairly clean and in decent shape. Air filter is clean. The condensor fan unit outside turns on and runs but mostly I don't get cold air on hot days, 95 deg+.

I've had 2 techs out since and they say the unit is working fine, but of course they were out when the unit was blowing cold. I've noticed that when it stops blowing cold, the large copper refrigerant line that connects to the outside condensor is warm and not cold.

The evaporator coils have not been checked as they are upstairs in the attic with the furnace in a pretty well sealed box. I don't feel comfortable tackling the opening of this myself to check them. Any idea what might be going on here? One tech I had over said the unit is undersized for the house.

House is 2600 sq ft. HVAC system has been split into 2 zones, upstairs and downstairs. Now I understand that the 3 ton unit probably can't cool both zones at the same time, but this unit can't even cool one zone.

Comments for Central Air Conditioner Is Cooling Intermittently.

Average Rating starstarstarstarstar

Click here to add your own comments

Rating
starstarstarstarstar
Maqsood NEW
by: Anonymous

Is that true fact that central air conditioner have intermittently cooling system. Check essay writing services reviews first and then make any important decision about your studies.

Rating
starstarstarstarstar
Good post NEW
by: Mrs. Royce Bartell

You are a great blogger!

When you started your first entries?
I also try to develop my site (wedding-max.com), but I can't adverstand how you write so great articles.
Could I suggest to place some ads on your blog? I really love your style and your audience, I think halloween costumes will be interested for them.
I will you pay the amount you want, answer me, please! Thank you!

Rating
starstarstarstarstar
Chilling Tower vrs. Compressor outside NEW
by: Anonymous

Sir...I live in a condo and we have chilling tower on the roof. Seems the air that is blowing out is giving me running nose and sinus infection, I clean the filters and I have 3 BlueAir purifiers in the condo. I have pics of the filters after 6 months ( recommend by Blue Air) I know will change after 4 months.

Does the chillng tower blow out a different cold air than if I had a compressor outside.

I always sick,

Please respond by email. sfi.florida55@gmail.com

Thanks in advance. Sal

Rating
starstarstarstarstar
Great read NEW
by: Stuart

This was a great read, thanks for posting! http://www.howardserviceshvac.com

Rating
starstarstarstarstar
Cycling Time Reply NEW
by: Joseph

We install Air Conditioning in Auckland. If the unit is short cycling like that it is either usually low on gas or the compressor is cycling on the thermal cut-out.

Rating
starstarstarstarstar
Domestic and Commercial Air Conditioning Services NEW
by: Anonymous

Click air conditioning central coast for batter Domestic and Commercial Air Conditioning Services

Rating
starstarstarstarstar
Cycling Time NEW
by: Barry

Staying in 3-story condo complex (block/concret construction) in third floor unit with flat concrete roof above. There is air conditioner unit on roof above bedroom. This unit is for first floor unit below me. The AC runs for one minute and cycles off for three minutes. This has been constant of last four days. It is noticably loud at night while sleeping. Can hear unit with window open or closed. Condo maintenance says there is nothing wrong with this AC unit but they are not sleeping directly under it.

Any thoughts on frequency of This AC's cycling pattern?

Rating
starstarstarstarstar
hope this helps
by: Dan Garcia

if you were to go off of rule of thumb which is 600 square feet per 1 ton of cooling then a 3 ton would only be capable of removing only 36000 btu of heat up to 1800 square feet.

now you said you have over 2600 square feet so rule of thumb would be 5 ton unit because you are over the 2400 square feet for the 4 ton capacity. BUT, Thats not the way to do it RULE OF THUMB.

If you want the job done correctly then a manual j whole house load calculation should be performed.

What that does is by measuring the house windows doors and attic insulation the technician should be able to figure out with multipliers how much heat is coming in to the house thought the windows walls doors and attic so then the technician will then know how much heat to remove. its easy to figure what your problem is just by your comment of saying it works fine when its not to hot.

well thats is the 80/20 rule. that means that 80% of the time the temperature is medium to mild so the air conditioner will be acting normal and comfort cooling is manageable but now on those other 20% of days the temperature is extreme and being that the unit was not sized for the extreme temperature it will have an unbalanced saturation curve for the refrigerant.

you need to find another contractor that is capable of performing these calculation.

Click here to add your own comments

Join in and write your own page! It's easy to do. How? Simply click here to return to York Central Air Conditioner Reviews.