can you adjust the blower in your household airconditioner for more airflow?

Question

if you can please tell me how.

Answer 1

if you are having airflow problems, changing the fan speed will help but it will not cure the problem. more than likely the filter is really dirty or, the number one cause is a dirty squirrel cage. pull the evaporator motor out and clean the squirrel cage and you will be surprised at the difference. to change the speed reverse the leads going to the red (low speed) and the black (high speed), but you will have to change them back for heating season.you can't push warm air to fast or you defeat the purpose of heating it.

Answer 2

If your airflow is less than usual, it could be from a few things. The first and easiest is to change the filter. The evaporator coil could also be dirty; that's usually a job for a service tech. The blower wheel could be dirty enough to slow the air flow somewhat. If you're pretty handy, you might can take it out and clean it yourself. Just make sure to turn off the circuit breaker before you do. Some blower motors have multiple speeds, and some even switch speeds between heating(slower) and cooling(faster). I usually don't recommend turning up the speed, because the unit is set for the air to pass through the coil at a certain rate, which cools it and removes moisture. If it flows too fast, it won't come out the duct as cool, and it will be a little humid, which could make your windows sweat. Too slow, and the coil could freeze up. In the winter, too fast, and the air won't get as warm; too slow, and the heater coil or chamber will get too hot and shut itself off. I hope this helps.

Answer 3

It depends. You could put a new impeller (the fan part) which is more efficient. You could put a faster (higher RPM) motor in. If the fan is belt driven, you can put a larger sheave on the motor (like changing the gear ratio)...but that depends on if the motor can handle the higher load without burning up.

If you want, check out the label info off of the motor (amps, HP, RPM, etc) as well as measuring the diameter and number of blades on the blower. Also check if it's direct drive or belt driven. If it's belt driven (less likely) measure the sheaves (the pulleys) and jot it all down.

Check out http://mcmaster.com and compare against their available parts. They're expensive, but the catalog is nearly exhaustive. It might provide a solution. It might also get overwhelming...calling an HVAC service might be less of a headache.

Bottom line, there's nothing you can simply tweak with what you already have to make the airflow change. It involves new parts.

Answer 4

I have only found, that if you close off the vents to rooms you aren't as concerned over, like the bathrooms or other parts of the house you don't spend as much time in.. that the air pressure that would have gone there is shut off now and may cool the other rooms you use more often.

Answer 5

If it's old, replace the motor with a newer, more efficient one.
If it's new (or alternately) you could add booster fans in the ducts, or on the vents, or replace the motor with a more powerful one (make sure it can fit in, and doesn't draw too much current).

Answer 6

I don't think this is something you can do. If it can be done, it's certainly something for an a.c. technician. It may have to do with the size of your blower motor. You can check other things such as air filters.

Answer 7

all ducts should blow evenly. there might be a loose duct under the house.