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Error code 5 flashes LED

My Carrier 40QNB-18 mini-split system won't start; has error code with 5 flashes of LED. This points to compressor (Carrier 38HDL). May be capacitor but not sure if it would be primary or start assist capacitor. Anyone have any suggestions for how to get this old mini-split working again?

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4 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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greenspan
  • 1734 Answers

SOURCE: LG split (3 indoor) LMU360CE

The LED #2 is only flashing while in disconnection or short in Thermistor (3 sec off / 0.5 sec on). If you want to change it, note: this is not an easy job to do! You will need to remove the top panel, then remove the control paneland then the front panel to gain access to the thermistor. The part isnot available to the public and requires an authorized service techfrom LG to take care of this problem. You will need a special tool toremove the front door seal spring clamp.
But you can call customer service @ 800 243 000 and see if theycan transfer you over to parts. Just give them the model and serial #and see if they would be willing to sell you the thermistor part. Youwill also need the door seal spring clamp removal tool to make the jobeasier.

Posted on Aug 02, 2009

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SOURCE: I have a domestic carrier air-conditioner in

I believe this code is for the outdoor coil sensor not reading or out of range. Check the sensor in the outside unit to see if on of the wires broke or came off it should be located in the outside unit on one of the copper lines near the bottom. If you look through the grill on the outside unit you should see it.

Posted on Jan 07, 2010

  • 1 Answer

SOURCE: ERROR CODE 5 FLASHES CARRIER SPLIT SYST. AIR COND. 42G250HP-1

5 flashing is ' compressor drive' and check the high pressure, condenser fan motor capacitor for proper running

Posted on May 21, 2010

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