Pitco fryer troubleshooting
Pitco publishes troubleshooting charts in its manuals, and most of the faults on them are fixed by staff in a minute: a breaker, a reset button, a drain valve not quite closed, a filter pan not pushed all the way in. This guide collects them, by symptom.
Let oil cool before reaching near the burners or elements, and before resetting any limit switch. Never let water reach hot oil — Pitco warns it causes a steam eruption that throws oil. If you smell gas, turn off the fryer's gas valve and call a gas technician.
First: which Pitco do you have?
| Front of the fryer | Type | Examples |
|---|---|---|
| Gas valve knob marked PILOT / ON / OFF, thermostat dial | Gas, standing pilot (millivolt) | SG14, SG18, 35C+, 45C+ |
| Digital controller or computer, gas connection | Gas, electronic ignition | SGH50, Solstice Supreme |
| Controller, no gas connection | Electric | SE, SEH, SEM, SELV |
On a standing-pilot fryer, most "won't heat" problems are really pilot problems: see fryer pilot won't stay lit. The rest of this guide covers all three types.
Controller won't come on
Pitco's chart, in order:
- No power to the fryer — check the building supply.
- Controller not switched on.
- Power cord loose or unplugged. Gas fryers with controllers still need mains power.
- The fryer's circuit breaker has tripped — reset it.
- The fryer's own fuse has blown — that's a service call.
If the display only ever shows OFF and won't turn on, Pitco's electric fryer manual says to switch the building breaker off and back on. If that doesn't reset it, the computer is faulty.
Controller is on, fryer won't heat
Pitco lists two reset buttons here, and on gas fryers there may be two of them:
- High temperature limit. The safety switch that cuts heat if the oil gets too hot. Let the fryer cool, reset it, then turn the controller off and back on — Pitco says the controller won't heat again until it has been power-cycled. Pitco's quick guide puts the red reset button on top of a box labelled high limit reset, behind the gas valve inside the door.
- SCBS thermal limit (on fryers with Pitco's self-cleaning burner system). Pitco's chart says to press the button on the thermal limit switch to reset it, and to call service if the problem continues.
On the electronic SGH50, Pitco's service manual gives the high limit trip point as 450°F ± 15°F, and says it won't reset until the oil has cooled to around 400°F. If it won't reset once cool, the switch has failed.
A high limit trips because oil reached a dangerous temperature, or because the switch is failing. Either way, resetting it repeatedly hides a fire risk. If it trips more than once, stop using the fryer and call for service.
What the controller messages mean
| Display | Meaning | What to do |
|---|---|---|
| HEAT FAILURE / IGNITION FAILURE | The heating system didn't respond. Pitco's manual names a tripped high limit as the cause to check first | Let the oil cool, reset the high limit, power-cycle the controller. On electronic-ignition gas fryers, the ignition module locks out after about 90 seconds without sensing a flame |
| DRAINING / TURN OFF | The drain valve has been opened, so the controller has shut off the heat | Close the drain valve fully, turn the controller off and refill. If it still shows with the valve closed, see the drain section below |
| PROBE OP / OPEN | The temperature probe reads as an open circuit. Heating and cooking are suspended | Service call: probe or its wiring |
| SYSTEM FAILURE | The probe reads as a short circuit. Heating and cooking are suspended | Service call: probe or its wiring |
| HIGH TMP | Oil is more than 40°F above the set temperature, or above 410°F | Turn the fryer off and let it cool. If it happens again, call service — the fryer isn't controlling its temperature |
On simpler solid-state controllers, such as the base SGH50 controller, Pitco uses lights instead of words: green means the controller has power, the left yellow light means it is calling for heat, and the right yellow light means heat has been confirmed. If the left yellow is lit but the right one never comes on, the fault is between the call for heat and the burners — the same high limit, ignition and relay checks as HEAT FAILURE.
Won't hold the right temperature
Pitco's charts point to a faulty temperature probe or a faulty high limit; both are service calls. On a thermostat-dial fryer, you can check calibration yourself with a good thermometer. Pitco's method for the 35C+ and 45C+:
- Set the dial to 325°F and let it cycle 4 to 6 times.
- Compare the thermometer to the setting. A difference of more than 5°F means it needs calibrating.
- If the burners don't turn off even at the lowest setting, Pitco says the thermostat could be defective. Stop using the fryer: the high limit is now the only thing between the oil and its flash point.
Drain problems
| Problem | Cause and fix from Pitco's chart |
|---|---|
| Valve closed, but the display still says DRAINING or TURN OFF | The blue drain valve handle isn't completely closed — apply a little more pressure. If it is closed, the drain switch is out of adjustment or faulty: service call |
| Valve open, oil drains slowly or not at all | Valve not fully open — push it further. Drain plugged with debris — clear it from inside the vat with the clean-out rod |
If the rod doesn't clear it, Pitco's electric fryer manual has you close the valve and clear the main drain line, and warns that hot oil may come out when the cap is removed. Let the oil cool first.
Filter problems
| Problem | Cause and fix from Pitco's chart |
|---|---|
| Filter pump won't start | The filter pump circuit breaker has tripped — reset it. On SE electric fryers, the breaker is behind the door of the left-hand fryer |
| Return valve open, no pump sound | Pull the red return valve handle fully open. Check the filter breaker. Press the red reset button on the end of the filter motor — its thermal overload has tripped |
| Oil returns to the vat slowly or not at all | Dirty filter paper — change it. Dirty strainer cap — remove and clean it. Filter pan not pushed in completely — push it home |
| Lots of air bubbles in the returning oil | The pickup tube screen cap is loose or missing, or the filter pan isn't pushed in all the way |
Pitco says the filter pump must not run continuously. Running it for long periods is what trips the motor's thermal overload.
Oil level and boil-out
- The oil must never fall below the minimum line on the vat. Pitco calls that a fire hazard. Top up slowly to the MAX line.
- Gas fryers must be full before the gas valve goes to ON, with the burner tubes covered.
- After a boil-out with water, the vat must be completely dry before oil goes back in.
Maintenance Pitco specifies
| When | Task (Pitco SE/SEH/SEM manual) |
|---|---|
| Start of day | Assemble the filter, drain, polish the oil for about 30 minutes, refill and check the level |
| Mid-day | Turn off, rinse crumbs from the tank, drain, filter briefly and refill |
| End of day | Turn off, drain, remove the screen, scrub the sides, refill. Clean the filter unit once it has cooled for at least 30 minutes, with hot water only, and dry it completely |
| Weekly | With the oil cool, pull the fryer out, check the hood drip cup and baffles for grease, clean the fryer sides and back |
| Monthly | Temperature accuracy check |
| Yearly | Inspection by a qualified technician |
What to tell the technician
- Model and serial number, from the data plate inside the door.
- Gas or electric; for gas, natural gas or LP.
- The exact message on the display, or which lights are on.
- Which reset buttons you pressed, and whether they held.
- Whether the problem is constant or comes and goes during service.