Air Conditioner: Low suction + high superheat (starved evaporator)
Low suction + high superheat (starved evaporator) on a air conditioner: Possible causes and checks for: low suction + high superheat (starved evaporator).
Common causes of low suction + high superheat (starved evaporator)
- Low charge/leak, TXV bulb lost charge (valve closed), plugged drier
How to fix low suction + high superheat (starved evaporator): step by step
- Inspect bulb
- Replace TXV + liquid line drier
- Check oil for acid
- Recover/evacuate/recharge. (32E) p.878 [852]
If the unit shows an error code, look it up: Carrier Air Conditioner codes Goodman Air Conditioner codes KeepRite Air Conditioner codes Lennox Air Conditioner codes Trane Air Conditioner codes
Source: General HVAC service practice — verify per model. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.