Question about AmcorAire UCHW-H24AF2 Split System Air Conditioner

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Blower fan runs at one speed - very low

I just finished installing the Amcoraire Duo system and when we turn it on the fan runs very slow. Changing the fan speed doesn't seem to help.

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  • Ron Hubbard Mar 10, 2009

    I had the HVAC man come back and check the charge. We even charged beyond normal then later backed it off. No change in operation. The thing is, even in just FAN mode the fan has only one speed.

  • MauiYow May 13, 2009

    I have the same problem. The wall unit blower fan only runs very low. Everything is good with the temp, it's cold (even at 74 it's almost freezing me). To make it work I just have to take a little bamboo stick (like a kabob stick) and nudge the blue blower to start turning. It begins to turn but very slow. I've tried to change the blower speed on the remote, low, med, high, but it still only blows very low. When it does turn it squeaks. Any thoughts would be appreciated.

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There is a sensor on the indoor coil that needs to reach a certain temp before the fan speed will increase. Sounds like the unit is undercharged if the sensor isn't reaching the temp it needs to.

Posted on Mar 10, 2009

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1 Answer

3 speed fan barely changes speed


You are talking about your blower fan for the air conditioner and heater right? More information will be needed to solve the problem.

When you say it barely changes speeds, does that mean it doesnt speed up, or doesnt slow down? By that I mean, is it "stuck" on low, or high?

Most blower fans run at different speeds through the use of a multi-stage resistor built into the fan switch circuit. Low speed is a high value resistor, medium speed is a low value one, and high speed is the fan running without any resistance.

If your fan is running on high and doesnt seem to want to run on lower speeds, the resistor pack may be failing. If the fan is running on low speed only, it may be that the fan itself is beginning to fail, or that the lubricant in it has gotten gummy.

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this a split system? inside and outside unit? possible relay( if it has one) or contactor. make sure 230 volts at contactor.

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Can you operate an amcoraire duo UCHW-H12AF2 without a remote control?


The unit will run @ 75 degrees without the remote. Go to Ebay.com
Search Amcoraire Remote Control, you will find what you need.

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I have 91 Toyota camry & just recently my fan blower on works on high, the medium and low functions don't work. Is there something wrong with my fan blower?


No.

Probably not. If it runs on high, it is probably good.
Unless is sounds slow or 'tight' on high, or squeaks or chips , etc. Run the fan with the engine off and then shut the fan off and listen and see if you can hear how long it takes to slow down. If it stops in just a second or two, the bearings are tight (dry). If it spins down normally, maybe three to eight seconds or more, the motor is fine. You really don't need this check.

It is most likely your blower relay.
Most cars have one or two relays to control the fan motor, which is a single speed motor that the relays and speed switch and blower resistor control the power to.

One relay is for high speed, also switch contact.
One relay is for other speeds and divert current through a blower resistor located by the fan duct under the dash or under the hiid by the fan.
Also the switch contacts for each speed.

It cad be the dash switch, which has to handle the blower resistor current for all the lower speeds is burned out at those speeds.
It can be the low speed blower relay, as I mention above, is burned out, this is most frequent cause.
it can be the blower resistor is burned out, this can give no low speeds, or loose speeds below a certain speed setting.

Try you manual for the blower relays' positions. Try swapping with the horn relay to test if it is the same type of relay.
Take out the blower resistor carefully (pretend you are defusing a bomb or playing "operation" game as it has exposed coils that are delicate and if you bump the sides of the opening as you extract it you will damage it and short the coils against each other). the wire coils are very fine bare wire coils that look like springs and if touching can burn out.
Switch is harder to test because hard to get at, check the other things first.
You should be able to test for voltages at the resistor plug to see if power is coming from the switch, but wiring schemes can vary.
Post back or use shop manual to troubleshoot the switch.

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1 Answer

AmcorAire Duo. Compressor runs, but fan will not. system shuts off after a rew minutes (overheating coils?). Has the fan burned out or is there a relay that needs to be re-set?


There is a solid state fan capacitor for your system, I would change that part first.
We stock a complete line of parts for Amcor Mini Split Systems.
Support@Pridiom.com
201-266-8234 option 2

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1 Answer

Intermittent blower speeds


pull motor ,check for burned wires onfan and bak of fan speed switch,fan could be the problem un hook fan and conect directley to 12 volts and see if varibles exsist,if so replace fan motor/look for a fan resister if all the other things check out

Jul 03, 2009 | 1999 Chevrolet Suburban

1 Answer

I have 1991 honda accord, heater blower motor does run but very slowly in all speed positions i have removed the blower assbly. and motor seems to turn free. is there a speed control that may be bad ?


If you have removed the blower motor, Connect it to a 12 volt power supply(your battery)with some jumper wires.It should turn fast, be careful when you connect it, have a good grip on it, it will jump just a little. If it dont run fast its junk. The other 2 things
1)The fan switch
2) The resistor that slows the fan at low speeds.

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1 Answer

Inside blower fan barely running


Look at the control board for dip switches also the black lead(fast) should be on ac terminal. If the indoor coil is too small or there is restrictced air flow can also cause this problem,

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1 Answer

Coleman outdoor furnace/AC blower speed too fast


You are right slow for heat and fast for A/C. Here are the blower speeds black is high blue is med. and red is low if you have orange it would be med low. Look on the control board and see what color wire is connected to heat and let me know if you have something other then control board. You can take the wire that is on park and swap them around. ken

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1 Answer

Heater fan is SLOW....


check to be sure that nothing has made a nest in your blower motor.. I have found mouse nests, rats nests, and even dead snakes inside the blower motor on these trucks..with all the extra weight inside the blower, the low speeds turn slow and will burn the resistor out quicker.

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