Super and Sub

[guttmech]

where exactly in english do you take temp readings for subcooling and superheat in residential fridgs, AC and heat pumps. this site is fantastic

["refer" man that can]

To check subcooling you take liquid line temp at the service valve and convert your head to a saturated cond temp.Subtract to get subcooling.

To check superheat you take suction line temp at service valve (a/c applications) and convert your suct pressure to saturated suct temp. Subtract to get superheat.