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New A/C system is not cooling well at night.

2.4K views 15 replies 7 participants last post by  Frosted  
Alot of guessing could be done on this one for sure.That is all it would be without complete facts.
OP given 18-20* during daytime heat load and 8-10* at nightime heat loads.
First I'll say to get such a large drop in daytime return air to supply air temp it has to be close to correct charge unless it has low airflow. Secondly, either the wet bulb temp is shooting way up at nights indoors increasing the latent load tremendously then accounting for the lower sensible temp difference found at night or ??, maybe recheck your data cause it don't compute.

Good luck and lets us know the outcome of this weird one.
 
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