LPG Griddle Maintenance: Burners, Plates & Weekly Checks
Last updated: July 2026
In 30 seconds:
- Weekly: a 15-minute safety check — leak test, hose, flames, thermocouple — keeps your griddle safe and trading.
- Daily: scrape, wipe and lightly oil the plate. Empty the fat drawer.
- Every 6 months: Lincat recommends a professional service. In the UK, that means a Gas Safe registered engineer.
- Never clean an LPG griddle with a water jet. Never open the propane path yourself.
- The Lincat GS range (GS4/P from £1,104) carries a 2-year parts and labour warranty. Unauthorised work voids it.
A commercial LPG griddle works hard: hot fat, carbon, and a propane burner running all day. This guide covers the maintenance that keeps it reliable — what you do daily and weekly, and what you leave to an engineer.
A 15-minute weekly safety check is the standard maintenance routine for a commercial LPG griddle in mobile catering. It’s the routine Lincat’s own service instructions point to, and it’s widely regarded as the minimum for any propane appliance that trades outdoors.
Your LPG griddle maintenance schedule at a glance
| How often | What | Who |
|---|---|---|
| Every trading day | Scrape the plate, wipe down, light oil coat, empty the fat drawer | You |
| Weekly | 15-minute safety check: leak test, hose, regulator, flames, thermocouple | You |
| Monthly | Deep clean and re-season the plate; clear carbon build-up | You |
| Every 6 months | Full service: burner pressure, thermocouple gap, soundness test | Gas Safe engineer |
| Yearly | Gas safety certificate (CP44) for your whole van or trailer | Gas Safe engineer (CP44) |
Why a schedule? Griddle faults build slowly. A sooted thermocouple or a blocked burner port won’t stop you today — it stops you mid-service on your busiest Saturday. Little and often is cheaper than a breakdown.
Daily habits that prevent most problems
While the plate is still warm, scrape food residue into the fat drawer. Wipe the plate, then apply a light coat of cooking oil to protect the steel.
Empty and refit the fat drawer every day. A full drawer overflows into the burner space below — that’s a fire risk and a cleaning nightmare.
For the full plate routine, see our guide to cleaning and seasoning an LPG griddle. The short version: warm water and detergent, no abrasives on the outer stainless panels, and never a water jet anywhere near the unit.
The 15-minute weekly safety check
Do this before service on a quiet morning, with the appliance cold and the propane cylinder connected. It mirrors what an engineer checks between services.
Step 1 — Leak test the connections
Brush leak-detection fluid (or washing-up liquid solution) over the cylinder connection, regulator and hose ends. Turn the propane on and watch for bubbles.
Why: a slow leak wastes propane and is the single biggest safety risk in a van. Bubbles mean shut down and call an engineer.
Step 2 — Check the hose and safety chain
Look for cracks, kinks, scorch marks and the date stamp. UK LPG hose should be replaced within 5 years of its manufacture date. Check the cylinder’s restraint or safety chain is in place.
Why: hose perishes from heat and UV long before it fails visibly. Full detail in our LPG hose and regulator regulations guide.
Step 3 — Check the regulator
Confirm the regulator is a 37 mbar propane unit, undamaged, and within its 10-year service life. Don’t adjust it — the griddle’s burner pressure is set from this supply.
Why: Lincat GS griddles need a 37 mbar propane supply, giving 25 mbar at the burner. Wrong regulator = weak or dangerous flames.
Step 4 — Light up and read the flames
Light each burner and look through the sight holes in the fascia. You want steady blue flames, even across the burner. Yellow, lazy or uneven flames mean soot or a blockage.
Why: flame colour is your free diagnostic. Yellow flames deposit soot on the thermocouple and waste propane.
Step 5 — Test the flame-failure device
When lighting, hold the control knob in for about 30 seconds, then release. The burner should stay lit. If it dies on release, the thermocouple is failing or out of position.
Why: the thermocouple is what shuts the propane off if the flame blows out in a breezy gazebo. It must work every time.
Step 6 — Clear the burner area and fat drawer
With the unit off and cool, check the burner ports and sight holes are free of crumbs, grease and carbon. Refit the fat drawer correctly.
Why: blocked ports cause uneven heat across the plate — one end hot, one end cold.
Step 7 — Check the controls and plate
Turn each control knob through its range. It should move smoothly between MAX and MIN. Check the plate surface for deep carbon or pitting that daily cleaning isn’t shifting.
Why: a stiff valve or heavy carbon now is your early warning to book the 6-month service sooner.
Burner care: what’s yours, what’s the engineer’s
You can: keep burner ports clear, watch flame colour, and clean the visible burner area with a soft brush once cool.
Engineer only: anything behind the fascia. Removing the burner means lifting the griddle plate off — Lincat states this is a heavy two-person job. Injectors are fuel-specific (a 0.75 mm jet on the GS7/P propane model), and the control valve is factory pre-set. Getting any of this wrong changes the burn and voids the warranty.
Plate care in one paragraph
Scrape daily, wash with hot soapy water, dry, and oil. A wire brush is fine on the steel plate for carbon — wear eye protection. For baked-on deposits, use a proper de-greaser such as Carbon-Off rather than attacking the plate. The GS plate is 12 mm machined steel welded into the frame, so there are no seams for food to hide in — keep it seasoned and it will outlast the van.
The thermocouple: the part that stops most griddles
The thermocouple sits in the flame and holds the propane valve open. When it soots up or drifts out of position, the burner won’t stay lit.
- Symptom: burner lights, then dies when you release the knob.
- Correct position: 3 mm from the centre of the thermocouple to the burner face.
- Health check: an engineer tests for a minimum 5 mV output and cleans off soot.
It’s a cheap, standard part (Lincat code TC34) — but replacing it means opening the appliance, so it’s an engineer job on a warranted unit.
What the 6-month service covers
Lincat recommends a competent engineer services GS griddles every 6 months. A proper service includes:
- Checking the installation — correct hose, safety chain, and a separate isolation valve.
- Measuring burner pressure at the test nipple with all burners on full (25 mbar for propane models).
- Inspecting burner condition and clearing the ports.
- Cleaning the thermocouple and confirming the 3 mm operating distance.
- A full leak (soundness) test of the propane pipework.
If you trade from a van or trailer, pair this with your annual CP44 gas safety certificate — most engineers will do both in one visit. Councils and event organisers routinely ask to see the certificate.
Spares worth knowing about
These are the Lincat part codes for the GS range. Quote the model and serial number from the data plate when ordering.
| Part | Lincat code | Notes |
|---|---|---|
| Thermocouple | TC34 | The most common wear part |
| Griddle burner | BU87 | Engineer-fit — plate must come off |
| Burner injector (GS7/P) | JE141 | Propane, 0.75 mm, stamp code 75 |
| Burner injector (GS4/P) | JE67 | Propane, 0.88 mm, stamp code 100 |
| Multi-function valve | VA11 | Factory pre-set — state model and fuel type |
| Control knob | KN184 | Keep the spring clip when removing |
Warranty: what’s covered and what voids it
The Lincat GS7/P (from £1,499) and its smaller sibling carry a 2-year UK parts and labour warranty. Here’s the plain-English version of the conditions:
- Covered: defects in materials and workmanship, repaired by Lincat’s authorised service companies.
- Not covered: accidental damage, misuse, wear and tear, incorrect adjustment, or neglect.
- Voids it: installation or service work by anyone who isn’t a qualified, Gas Safe registered engineer.
That last point is the one that catches people. A mate “having a look” at the burner is cheap right up until it costs you the warranty on a £1,499 appliance.
Five things never to do
- Never use a water jet or pressure washer on the unit — Lincat’s instructions prohibit it.
- Never use abrasives on the outer stainless panels. Warm water and detergent only.
- Never open the propane path — injectors, valves and burners are engineer territory.
- Never run without the fat drawer correctly positioned.
- Never switch to butane. Commercial griddles are set up for propane at 37 mbar, and butane stops vaporising below about 2°C — useless for UK outdoor trading.
What maintenance costs
| Item | Typical cost | How often |
|---|---|---|
| Weekly safety check | Free — 15 minutes of your time | Weekly |
| Leak-detection fluid | from £5 | Lasts months |
| Replacement LPG hose | from £15 | Within 5 years of date stamp |
| Replacement 37 mbar regulator | from £35 | Within 10 years |
| CP44 gas safety certificate | from £120 | Yearly |
Set against a lost weekend of trading, the whole year’s maintenance costs less than one dead Saturday.
Browse the full LPG griddles range if you’re weighing up a new unit, or start with our guide to setting up and using an LPG griddle in a food van.
FAQ: LPG griddle maintenance
How often should an LPG griddle be serviced?
Every 6 months by a Gas Safe registered engineer — that’s Lincat’s own recommendation for the GS range. Add your annual CP44 gas safety certificate for the van or trailer, and do your own 15-minute safety check weekly.
Can I service an LPG griddle myself?
You can clean it, do weekly leak and flame checks, and keep burner ports clear. Anything on the propane path — injectors, valves, burners, thermocouples — must be done by a Gas Safe registered engineer, or you void the warranty.
Why won’t my griddle burner stay lit?
Almost always the thermocouple. Hold the knob in for 30 seconds when lighting; if the flame dies on release, the thermocouple is sooted, out of position (it should sit 3 mm from the burner face) or failing. It’s a standard part — Lincat code TC34.
What pressure does a Lincat GS7/P griddle run at?
A 37 mbar propane supply from the regulator, with the burner pressure set to 25 mbar at the test nipple. The GS7/P draws 8.0 kW at full rate, using about 0.57 kg of propane per hour.
Can I run my griddle on butane in winter?
No. Commercial mobile catering runs on propane only. Butane fails to vaporise below about 2°C, so your griddle would starve of fuel exactly when winter trading gets busy. GS griddles are supplied set up for propane at 37 mbar.
How long does a Lincat GS griddle take to heat up?
About 20 minutes from cold to full working temperature. Build that into your prep routine rather than turning the burners past MAX — there’s nothing past MAX.
What griddle spares should I carry in the van?
Realistically: a spare control knob (KN184), leak-detection fluid, and your engineer’s number. Carry a thermocouple (TC34) too if you’re doing big events — an engineer can fit it quickly, but nobody stocks parts on a Sunday.
Does poor cleaning affect the warranty?
Yes. Lincat’s guarantee excludes damage from neglect and misuse — and that includes water-jet damage and abrasive scouring. Follow the daily scrape-wash-oil routine and the plate and panels stay inside the warranty terms.