I have a Carrier Aircon. Model 42QH12-C E5 ES ERROR

https://www.luceaircon.sg/blog-article/carrier-air-conditioner-error-codes

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no info generic answer the code for your make or model is only 4 digits look up online or call customer service for assistance

Try resetting the AC by flipping the breaker for a few mins and see if that clears the error. If you need more questions for your Air Conditioning Repair needs, check us out online

I have an MP160 which is now over 7 years old and still going strong. I refill my own cartridges and sometimes get the E5 error after refitting a cartridge. More often than not this fix works for me.
With both cartidges fitted and the printer turned on, open the printer top and wait for the cartridge carrier to move left then right. Immediately it begins to move to the right, quickly push the carrier with your finger as far to the right as it will go and close the top. If you hesitate too long and the carrier starts its travel to the far left, close the top and wait until the whirring noises stop and try again. That usually clears the E5 error.
If it doesn't, open the top, wait for the carrier to park in left position and remove and replace both cartridges. After refitting, give each cartridge a gentle wiggle to help ensure that all the electical contacts are properly seated in the carrier, then close the top.
Note that if the cartridge is faulty, in my experience the E5 cannot be eliminated.

The only two things that would cause that are freon pressure too low in the low side, too high on the high side or the compressor is overheating.

Fan motor for indoor unit problem plz change it

This might help. http://www.youtube.com/watch?v=3q-pDGdZW1M

E5 Outdoor activation of compressor over heatprotection or motor lock

Please clean the condenser coil. And also check out door fan motor rpm. Rpm may be less due to weak capacitor. Replace it.If motor locked you have to replace new motor only.

If helpful, please write.

i am air con tech and i face all ready this problem may be it will help u . e5 error is ur air con not have gas becoze of that the low presser switch give error on disply thanks best regard for all. pls let now if its help full

Carrier A/C split Model # 38KCL112313GP has error code E1 What is that?