RV Maintenance Checklist: Monthly, Seasonal and Annual Tasks

An RV maintenance checklist is what stands between a rig that runs for decades and one that quietly rots in storage. An RV is a house that experiences a small earthquake every time it rolls down the highway, and its enemies — water intrusion, dried-out sealant, aged tires, neglected batteries — work year-round whether the wheels turn or not. This checklist organises the work into monthly, seasonal and annual rounds: what to check, how often, and which jobs are worth handing to a professional. Print it, keep it in the rig, and work it in order.

Why RVs Need a Schedule, Not Good Intentions

Almost every expensive RV repair starts as a cheap, visible problem: a cracked seam that lets water into a wall, a tire that aged out while the tread still looked fine, a water heater anode rod consumed down to the wire. Manufacturers build maintenance intervals into their manuals for exactly this reason — sealant is typically inspected every 90 days, bearings serviced annually, appliances checked each season. The tasks below follow that published guidance. Most take minutes; the failures they prevent take thousands.

Monthly Tasks: The 30-Minute Round

Tires: check pressures cold with a real gauge, and look at the sidewalls for cracking or bulges. Pressure and age — not tread — are what retire RV tires.
Sealant, quick pass: walk around and visually check roof seams, windows, doors and corner mouldings for cracks, gaps or lifted edges. A full roof inspection is seasonal (below), but early cracks show here first.
Run the generator: exercise it under load — an air conditioner or space heater — for about two hours a month at roughly half load or more. Generator manufacturers such as Cummins Onan recommend regular loaded exercise runs to keep fuel fresh and seals lubricated; a stored, unrun generator is a common no-start.
Move some water: run the pump and every tap briefly, especially in storage season. It keeps seals wet, refreshes the fresh tank and proves the pump still primes.
Batteries: on flooded lead-acid batteries, check electrolyte levels and top up with distilled water if plates show; wipe terminals and confirm connections are snug. Check the battery's state of charge — a house battery left sitting discharged is being damaged monthly.
Detectors and extinguisher: test the smoke, carbon monoxide and LP detectors and confirm the fire extinguisher gauge is in the green.
Interior check: open cabinets and the under-bed storage and sniff. Mustiness is water announcing itself; find the source now, not in spring.
Slides and seals: run slide-outs in and out once, and wipe the rubber seals. Condition slide seals a couple of times a year with a rubber-safe protectant so they stay pliable.

The Pre-Trip Round: Every Departure

Separate from the calendar rounds, run this short round before every trip — it catches the failures that strand people:

Tire pressures, cold, on every tire including the spare, against the placard or load table — not against how the tire looks.
Wheel torque on towables: lug nuts checked to the manufacturer's torque, and re-checked 25–50 miles after any wheel has been off. Loose wheels are a maintenance failure, not bad luck.
Hitch and towing hardware: coupler latched and pinned, safety chains crossed, breakaway cable attached to the vehicle (not the hitch), brake controller tested in the first hundred yards, and all trailer lights confirmed.
Motorhome fluids: engine oil, coolant, and washer fluid glanced at in the bay; a leak spotted on the driveway is a repair, spotted on the grade it is a tow.
Walk-around last look: antenna down, steps up, vents and windows latched, shore cord and hoses stowed, nothing dripping.

Seasonal Tasks: Spring Wake-Up and Autumn Lay-Up

Spring (de-winterising)

Sanitise the fresh-water system: a dilute household bleach solution through tank and lines, left to sit several hours, then flushed until the taste clears — the standard published method for a system that sat all winter.
Flush and inspect the water heater: refit the drain plug or anode rod (check how much rod is left — a rod eaten to its core wire is due), refill, and confirm the heater fires on both gas and electric.
Roof, properly: wash the roof, then inspect every seam and fitting closely and reseal anywhere the sealant has cracked or separated. This is the single highest-value hour in RV ownership.
Appliance check: run the refrigerator on both power sources, light the furnace and cooktop, and clear any insect nests from the furnace and fridge vents — a classic spring blockage.

Autumn (winterising)

Winterise the plumbing: drain tanks and lines, bypass and drain the water heater, and protect the system with non-toxic RV antifreeze or a thorough compressed-air blow-out — the plumbing is the half of winter preparation that cannot be half-done.
Seals and storage prep: last sealant check of the year, batteries charged and either maintained or removed, food and liquids out, moisture absorbers in, refrigerator cleaned and propped open.

Annual Tasks: The Service Round

Wheel bearings and brakes (towables): repack bearings and inspect brakes roughly every 12 months or 10,000–12,000 miles — the interval axle makers such as Dexter publish. Drum brakes are inspected the same visit.
Motorhome chassis service: engine oil and filters, belts, hoses and coolant per the chassis manufacturer's schedule (Ford, Freightliner, Mercedes-Benz as applicable), plus transmission and differential checks at their stated intervals.
Appliance servicing: a professional burner and flue service for the furnace and refrigerator, and an air-conditioner service including the roof gasket — a compressed, leaking AC gasket is a hidden water path.
Tire age audit: read the DOT date code on every tire, the spare included. Most guidance retires RV tires at five to seven years regardless of tread; budget for the set in the year it comes due.
LP system leak test: a manometer leak-down test and regulator check, done by a technician with the right gauge — cheap, annual, and genuinely safety-critical.
Full sealant renewal: anywhere the seasonal reseals have layered up or failed in sheets, strip back to sound material and reseal properly rather than burying bad sealant under good.

Records: The Habit That Pays at Resale

Date every task in a notebook or phone note, and keep receipts for shop work, tires and batteries. A documented maintenance history is worth real money when you sell — it is the difference between a rig a buyer trusts and one they discount for the unknown. Buyers cross-shop with exactly this mindset: our RV inspection checklist is written from the buyer's side of the same list, and running your own rig against it once a year is the cheapest condition audit there is.

What It Costs to Keep Up

Worked through annually, this checklist is the routine layer inside the overall maintenance budget — most owners who stay current land within the roughly $500–$2,000 a year planning range, as of October 2026, with the spike years being tires and appliances rather than routine tasks. Our full breakdown of annual RV maintenance costs itemises the spend task by task so you can set a reserve that matches your rig.

When to Hand It to a Professional

Do the inspections yourself — nobody else will look as often or as carefully — but hand over the work that needs gauges, torque or gas fittings: bearing repacks if you lack the tools, LP testing, refrigerator and furnace burner service, roof work on tall rigs, and anything structural. You can find service shops, inspectors and mobile technicians through the RV Frontier provider directory. And if the checklist's verdict is that the rig needs more than you want to spend, pricing it honestly against comparable RVs listed on RV Frontier tells you whether to fix it, sell it as-is, or keep it — the one answer the checklist never gives is "ignore it."