Question about Carrier Heating & Cooling

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I have a Carries AC unit (model FK4CNF002). Heat pump in the outside works but blower doesn't (tried both heat and cool). Power load (240V) on the blower is there and I also measured the voltage on control board terminals and they seem to have 26V voltages. The transformer feels hot. Any help and suggestion on what I should be looking next will be greatly appreciated.

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  • Carrier Master
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If you have determined that the line voltage is getting to the blower motor then the unit is defective and needs to be replaced. Check for the presence of the voltage at the wires going directly into the motor to make sure. It is not the compactor relay because it supplies power to both the compressor and condenser fan. If your air handler is inside the house, the housing also has circuit breakers for the fan motor - check that also.

Posted on Nov 24, 2013

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: Reverse Cycle not cooling!

I had a service man come out and he said the compressor was not coming on so he installed a hard start in parallel with capacitor solving the problem and is working normal now.

Posted on Dec 01, 2008

  • 56 Answers

SOURCE: problem with my AC unit

Hi Phillip,

Check your thermostat wires to see if you have any of them which are bare and touching. If any are touching separate them and tape em up and try unit again. You have a direst short in your cooling portion of the unit.

Posted on Feb 12, 2009

  • 26 Answers

SOURCE: I have a goodman furnace and ac unit the fan and

Look at the contactor on the condensing unit, remove the low voltage wires to the contactor and turn on the system. If the low voltage fuse doesn't blow, replace the contactor.

Posted on Jul 07, 2009

t1m130
  • 86 Answers

SOURCE: Blown Transformer heat pump

blown transformers are usually from a low voltage short the first thing i would do is wire a automotive or resetable 3amp fuse in line with the transformer so you dont blow transformer after transformer the wire coming off the transformer that say 24v take that wire a couple of inches down and cut it and install the fuse in series there
24v----------------
24v----------x----------
24v--------{3ampfuse}----------

now you can go through your low voltage wires one by one and test them unhook all the wires to your outdoor condenser at your indoor unit(furnace or airhandler) and try turning it to cool now if you blow the fuse the short is between the tstat and the indoor unit if the fuse is still good leave it on cool and hook up one wire at a time to your outdoor unit starting with R a lot of times your contactor or your defrost board will short out on you also look for pinches in wires wires with cracks in the insulation and wires touching metal this situation can be a real pain sometimes i would recommend calling a hvac company if you start to get stumped
hope this will help you

Posted on Jul 26, 2009

hvac1960
  • 2133 Answers

SOURCE: Amana PTAC unit will not

Compressor working ?
Please follow this tips:

To get proper cool, keep the tips as follows:
1. Check air filter is cleaned. 2. Check indoor coil is cleaned. 3. Checkindoor blower motor is working. 4. Keep in cool mode. 5. Set temp minimum 3degrees less than room temp.6.Check compressor is working with correctpressure.
Please specify, if any error code..........
Thanks. Helpful?

Posted on Jan 19, 2011

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Outside ac unit operates but no blower. Fan "on" does not operate from thermostat. However "heat" works fine furnace and blower. ???


Go to furnace and shut off power, remove blower door compartment. Inside you will find a control board where thermostat wires are connected. Should look something like this:

R-Red Wire= Power
G-Green Wire= Fan
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It sounds like you have a bad motor speed. So try this:

With Power Still Off, on the same control board there is a terminal usually marked Cool and Heat. There should also be a couple of terminals that are named park. The wires hooked to these are the fan wires..

Exchange the Heat and Cool wires on the terminal board. Put everything back together and try cooling again, if the fan comes on
then you have a burnt out motor speed. Go back to furnace and change
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Note: The reason why you put the blower door back on is because it
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