Ref Tools App
Troubleshooter
Essential information when troubleshooting refrigeration systems
Vapour bubbles in sight glass ahead of thermostatic expansion valve
Insufficient liquid subcooling
Liquid line too long in relation to diameter.
Liquid line diameter too small.
Sharp bends, etc. in liquid line.
Partial blockage of filter drier.
Solenoid valve defect.
Insufficient liquid subcooling because of heat penetration of liquid line, possibly from high temperature around liquid line.