Preventive maintenance (PM) is the scheduled cleaning, adjusting, and checking you do before equipment breaks. It is the cheapest insurance in the kitchen: it extends equipment life, cuts energy waste, prevents mid-service failures, and — importantly — is often required to keep a manufacturer warranty valid. The trick is turning "we should clean that" into an actual calendar with owners assigned to each task.
These are common intervals — adjust for your volume, water hardness, and grease load. High-volume or dusty kitchens should shorten them.
| Equipment | Task | Typical frequency |
|---|---|---|
| Refrigeration | Clean condenser coils | Every 1–3 months |
| Refrigeration | Inspect/replace door gaskets | Check monthly; replace as worn |
| Refrigeration/ovens | Calibrate thermostats | Every 3–6 months |
| Dishwasher | Delime / descale | Monthly (harder water = more often) |
| Steamer / combi | Descale | Per water hardness; monthly is common |
| Ice machine | Clean & sanitize | Every ~6 months minimum |
| Fryer | Boil-out & oil filtration | Boil-out weekly; filter oil daily |
| Hood/exhaust | Clean filters; certified duct cleaning | Filters weekly; duct per volume |
Dirty condenser coils are the number-one avoidable refrigeration failure. When they clog with dust and grease, the unit works harder, runs hotter, uses more energy, and eventually kills the compressor — a failure many warranties will not cover if the coils were neglected. Clean them on a schedule with a coil brush and vacuum. Worn door gaskets are the quiet energy leak: if the seal is cracked, torn, or no longer grips a dollar bill snugly, cold air escapes and the compressor never rests. Inspect gaskets monthly and replace them when they stop sealing rather than on a fixed date.
Thermostats and thermometers drift. Checking calibration every few months protects food safety and cooking consistency — a reach-in reading 38°F that is actually at 45°F is both a spoilage and a compliance problem. Descaling matters anywhere water is heated: dishwashers, steamers, combi ovens, and coffee equipment build mineral scale that ruins heating efficiency and shortens element life. In hard-water areas, descale more often than the manual's baseline, and consider water treatment upstream.
Make it stick: post a PM checklist, assign each task to a shift or role, log the date and initials, and keep the log. That record doubles as your warranty and health-inspection paper trail.
Staff can handle daily and weekly cleaning, gasket checks, coil cleaning, boil-outs, and basic descaling. Bring in a qualified technician for refrigerant work, gas components, electrical repairs, and manufacturer-specified service. A modest semi-annual service contract on refrigeration and cooking equipment often costs less than one emergency breakdown during a busy service. When you build the schedule, batch the noisy or messy jobs — coil cleaning, deliming, deep hood cleaning — into slow periods or closing shifts so they actually get done instead of being skipped during a rush. This guide is educational; always follow each unit's manual and applicable codes.