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Posted

In my ex-house i had central A/C the biggest complaint was the fan "speed" or volume of air coming out of the vents was too low. Several a/c guys over the years tried to sell me a new unit to compensate. One day I had the outside compressor pack up. I called one of those 24 hr emergency guys, He came out and fixed, Yes fixed the compressor not replace it. I asked him about the air handler speed. he pulled the cover of the inside unit and pointed to a couple of wires and said here's the speed control, right now your set at 1850 lets bump it to 2450 and he moved three wire to different places on the motor windings. Problem solved!! I'd still be there if it was my "EX" house but oh well. So in my non EX condo I have the same issue whats involved in making the fan motor go faster? I'm not talking world land speed record I just want to feel the air move when I'm 10 ft from the vent. Right now the house is cold enough in the summer and warm enough in the winter, I just want the air to move more.:bowdown:

Posted

We have talks-a-lot,,, you might be able to borrow him for a day or so.

Sorry, I really don't know, but for somebody to help you, you should post the make and model of your air-handler.

Posted

IF you have a multi speed motor the wire connections diagram or chart sticker, should be right on the motor. You can see what speed it is wired for and what options are available.

Posted

It should already be running high speed for cooling. (Low speed for heating)

The industry standard wire colors for the blower motor are black for hi speed, .....red for low speed....

The white will be common, and there's probably a blue and a yellow which would be the medium hi and medium low speeds; depending on how many speeds the motor has.

There'll probably be a couple of brown wires as well. (to the capacitor)

Anyhoo, unless the system is very old, there should be an electronic control board that, among other things, will switch power to the blower. There should be a terminal on there designated for blower cool, and one for heat.

Make sure the black (High speed) wire from the blower is landed on the blower cool terminal.

Any unused wires from the blower motor will either be insulated (wire nutted / taped)....or they may be landed on "Park" terminals on the board.

"Park" terminals are dead.....just a place to connect an unused wire.

Hope this helps, but if ya need to, feel free to pm or call me.:cool10:

Posted

sometimes it's maybe a problem with the ductwork causing the problem.it could be to big or small or too many run outs for the air flow. look and feel around the air handler and ductwork to see if you feel air leaking or on lower side look for dust or dirt around the tubing and wires openings. you can get duct seal from lowes to brush on any gaps or bad spots in the ductwork. you can use a good silicone chualk to seal around the tubing and such.

the only air handler I've seen with 3450 rpms was the dunin-bush space pack with the 4" duct runs to the vents, it would blow the hat off our head unless you have a commercial type blower that maybe running that fast.

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