5-10 min · 11 steps
R-290 Self-Contained Case Not Cooling
Diagnose a plug-in / self-contained display case on R-290 (propane) that isn't holding temperature — safety first, then airflow, electrical, and sealed system.
First step
SAFETY FIRST: Does a combustible-gas (LEL) detector smell/read any R-290 (propane) near the case?
Yes — gas detected / strong odor
No — area is clear
This is a preview of the first step. Run the full interactive diagnostic free — it walks you all the way to the likely root cause.