07/08/2026
Commercial fryer pilot keeps going out?
This is one of the more common fryer problems we see in restaurant kitchens.
A lot of people immediately think it’s a bad thermopile, dirty pilot, or gas valve issue. Sometimes it is. But another common cause is the high limit thermostat.
The high limit is a safety control that shuts the fryer down if the oil temperature gets too high. Most fryers use a small sensing bulb and capillary tube to read temperature. That small tube is easy to damage, especially during aggressive cleaning or boil-out.
If the capillary tube gets kinked, crushed, bent, or the bulb gets knocked out of place, the fryer may start shutting down over and over again.
Common symptoms include:
The pilot lights but won’t stay lit
The fryer shuts off during service
The pilot has to be relit several times a day
The fryer works for a while, then drops out again
The problem started after heavy cleaning or boil-out
A few things kitchen managers can safely check:
Look at the pilot flame. It should be strong and steady.
Make sure the fryer flue is not blocked.
Compare the oil temperature to the fryer setting.
Think about whether the issue started after cleaning.
Visually check for obvious damage, but don’t bend or move the capillary tube.
And most importantly, don’t bypass the high limit or keep relighting a fryer that keeps shutting itself down.
That high limit is there for a reason.
Clean the fryer, but be careful around the safety components. A little caution during cleaning can save a lot of downtime later.
If your commercial fryer keeps shutting down, Gulf Coast Equip Care can help diagnose the issue and get it back in service safely.
