For some reason, the air conditioning upstairs in my 2 story home is not blowing cool air throughout. In the past, one of the rooms upstairs was extremely cold. however, the rest of the rooms upstairs remain hot. We keep trying to turn down, but it will not cool off the upstairs. With it turn down to 60 degrees, the temperature upstairs is still 86 degrees. What could be wrong the air. The once cold room is cold no longer. No matter how low we turn the air conditioner down, it does cool off upstairs. I need help. Let me know your thoughts.
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Re: Central Air Conditioning
It sounds like a restriction in your ducting. Feel the A/C vents in the hot rooms to see if cold air is blowing out of them. If the ducts are restricted, then it is possible that the air conditioning coils are freezing up from lack of circulation. Inspect the ducts if you can to see if there is any restriction.
Note that even if you feel air coming out of the ducts, it could be ambient as opposed to cold. The best thing is to measure the air temperature coming out of the ducts. It should be around 20 degrees colder than the ambient air at the intake of the A/C.
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Hello, sounds like it is either a low charge or lack of airflow, what type of filter are you using? sometimes those filters that claim to be super effecient will actually cut down on your airflow and cause the ac to freeze up.
Assuming that there are ducts ran upstairs and downstairs, it all depends on the square footage of the living spaces, i.e. bedrooms, living room, dining room, etc. You need an average of 1 cfm per sq ft. For every 1 ton of air, you have an average of 400cfms. So your 5 ton unit will cool/heat 2000 sq ft. A 16 seer unit with a 95% furnace is a nice buy and you will notice the difference for sure. Hope this helps!
I'm assuming you have had a competent Air Conditioning contractor look your unit over.if you trust your A/C contractor, why don't you work with them towards an answer? I would get an air flow and sizing analysis, a full equipment service/performance check, and see if there is something simple causing this dilemma. Possibly low refrigerant charge,or you have a filter or coil restriction on the indoor unit. I've seen mold plug a coil solidly before. And due to new federal regulations on air conditioning efficiency and the phase-out of R-22, I would recommend that any replacement equipment be done in full, not part and parcel. The newer two stage energy star rated cooling and/or heat pump offerings are a fantastic solution for premium indoor comfort, and the government is offering powerful incentives right now if you're in the market.
I f it is fan that has more then one speed if you run it all the time,it may
not be on high sample : low fan speed runs all the time
med fan speed for heat
high fan speed is usually for air conditioning so if everything is good then it maybe the relay.
Some of this depends on where the air handler/furnace is located. Most often in two story houses, it's in the attic upstairs, or in a closet upstairs. A duct routes air from the furnace to the downstairs supply duct, so it is a distance from the air handler. When the unit first initiates a heating cycle, that duct is going to be full of cool air, and the duct itself will be cool. So the furnace has to run long enough to push the cool air out, as well as warm the duct up, before your going to feel warm air at the registers downstairs.
Keep in mind, heat rises. And, your thermostat only monitors the immediate area where it's located. In your case, upstairs. Two story houses are problematic because of this. And one way around it is to have a damper system installed that distributes the air upstairs or downstairs based on a thermostat located in those spaces. There would be 2 dampers, and 2 thermostats (one upstairs, one downstairs). Each stat would control a damper, and the call for heat or cooling.
Let me know if you would like to consider a system like this, and I can point you to components to use. I've put several system like this in.
typical central air conditioning system is a split system, with an
outdoor air conditioning, or "compressor bearing unit" and an indoor
coil, which is usually installed on top of the furnace in the home.
electricity as its power source, the compressor pumps refrigerant
through the system to gather heat and moisture from indoors and remove
it from the home.
and moisture are removed from the home when warm air from inside the
home is blown over the cooled indoor coil. The heat in the air
transfers to the coil, thereby "cooling" the air.
heat that has transferred to the coil is then "pumped" to the exterior
of the home, while the cooled air is pumped back inside, helping to
maintain a comfortable indoor temperature.
Central air conditioning can also be provided through a package unit or a heat pump.
Indoor comfort during warm weather - Central air conditioning helps keep your home cool and reduces humidity levels.
- As your central air conditioning system draws air out of various
rooms in the house through return air ducts, the air is pulled through
an air filter, which removes airborne particles such as dust and lint.
Sophisticated filters may remove microscopic pollutants, as well. The
filtered air is then routed to air supply ductwork that carries it back
- Because the compressor bearing unit is located outside the home, the
indoor noise level from its operation is much lower than that of a
free-standing air conditioning unit.
Change the furnace filter. Make sure you use a cheap one when air conditioning, as the better ones restrict airflow when they filter out so much stuff and then plug up, not allowing enough air to pass over the cooling coil in the furnace's air plenum. Turn the A/C off for a few hours (with only the furnace fan on if possible) to melt the ice off the cooling unit inside the furnace.