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What would be the top 2 reasons 1 of the outside 20 amp fuses would blow?

Carrier air conditioner model 38CKC024340 blew 1 of the 20 AMP fuses outside what are the possible causes? Would the compressor be the most likely cause? Is it possible the capacitor could be the problem? Replaced both fuses and fan in house runs but nothing outside.

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There are only two possible things that it could be. The compressor or the fan motor. The compressor is self contained and cannot be serviced. You just replace the whole thing. The fan motor can be replaced.

Posted on Jul 11, 2013

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Posted on Jan 02, 2017

kstfas
  • 75 Answers

SOURCE: Air Conditioner malfunction

Hi, Sounds like you have a short in the control circuit to me. Turn off all power going to the unit. Write down or otherwise mark the wires leaving the control board going to the thermostat. Remove them from the control board. Replace the fuse. Turn power back on and see if the fan still runs. If it does, check and or replace the heat limit switch that brings the fan on during the heat cycle. It may just need adjusted. If the fuse blows, I would think that the control board is probably bad. If it doesn't blow, Remove the thermostat. Leaving all thermostat wires open check them with an Ohm meter. There should be no continuity between them. Twist all the wires together at one end and ohm them again at the other end. You should have complete continuity on all wires. If the wiring checks out, down power the unit. Double check your wire colors and rewire the control board. With all wires open at the thermostat, turn the power back on. Touch the RED wire to the YELLOW wire. The Condensing unit should come on. Touch the RED wire to the GREEN wire. The fan should come on. Touch the RED wire to the WHITE wire. The heat should come on. Down power the unit. Replace the thermostat. Test unit. If the fuse has lasted ok but blows now it is either wired wrong at the Thermostat or the thermostat is bad. I hope I have helped. NOTE: If you can not understand these instructions. Call a licensed Heating / Air conditioning company. kstfas

Posted on Sep 23, 2007

22yooper
  • 828 Answers

SOURCE: RV ROOF TOP AIR CONDITIONER TRIPS BREAKER

Possible low voltage condition would cause that kind of a problem. To small a cord without the ability to carry and maintain the voltage would cause a voltage drop. I would test the voltage supply and make sure it is within 10% of that required for your A/C to operate properly.

Posted on Jun 16, 2008

motor1258
  • 6674 Answers

SOURCE: Air conditioner fan will not come on and unit will run for 1 minute and stop

You hear the compressor kick in (Hum) but no fan comes on? Will the fan come on when just in fan mode, not cool, or do you have that set-up?

Posted on Aug 14, 2008

philbran
  • 242 Answers

SOURCE: My A/C (Carrier weathermaker 8000 hybrid) is not cooling properly

set the t-stat low and let it run for 5 minutes , stick a thermometer in the return air closest to the unit as possible until you get a good reading , then stick the thermometer in the cold air supply again closest to the indoor unit as possible let sit until it stops going down in temp.
this is called your temp difference and it should be atleast a 14deg. F difference from in to out. if its lower you have a refrigerant problem, Let me know how it goes.
Phil

Posted on Jun 10, 2009

luker711
  • 91 Answers

SOURCE: I have a Ruud air-conditioner/heat pump and it blows 5 amp fuse.

It sounds like the thermostat wire going to the condenser is ground, It either got pulled loose and is touching the housing or as in most cases the wire got cut or was chewed by an animal. You need to turn electric off to both devices and physically inspect the thermostat wire going from the air handler to the outside unit, also inspect where they connect inside the unit. When you find the break, cut and strip each individual wire and securely wire nut each conducter red to red white to white and so on. There you go all fixed. That's when I give you the bill for $75...except this time you write that check to yourself. Good Luck

Posted on Jul 14, 2009

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My comfort pro 6000 apu screen said low voltage and ac wouldnt work


1.Need to check the generator belt to make sure it's not lose or broke.
2.Remove bottom inspection cover and use a fluke meter and check for 110 at generator.
Those two thing's would be where I would start for the low voltage alarm. now for the a/c alarm. There could be multiply thing's to cause the a/c not to work. Do you have and functions on the driver control panel? I would start.
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I have a 2007 Honda Civic 2 door bought the car found the legacy LA 960 in the trunk worked great for 1 year took on a 500 mile ride and woofer gave out. Took to a repair shop they said fuse of 20 amps...


1. Stop going to this shop.
A fuse that keeps blowing is a sign of a problem. You never replace a fuse with one of a higher amperage because the idea is the fuse is suppose to blow before the the wires melt and catch on fire. The reason it stopped working and the fuse didn't blow is probably be cause the wire did melt someplace and you are lucky the car didn't burn. If it did burn and the insurance company found the 40 amp fuse, they would probably have refused to pay.
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3. not used
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