Leaving your motorhome in storage can be convenient, but returning to a dead battery or other starting issues is a common frustration. This comprehensive guide will walk you through troubleshooting why your motorhome won't start after storage, offering solutions for various potential problems. We'll explore everything from simple battery checks to more complex electrical and engine-related issues.
Why Won't My Motorhome Start After Storage?
This is the central question many RVers face. The reasons are varied, but often boil down to these core issues:
Dead or Weak Battery:
This is the most frequent culprit. Even with a fully charged battery, extended periods of inactivity can lead to self-discharge, especially in colder climates. Parasitic drains (small electrical draws even when the motorhome is off) can further deplete the battery over time.
How to Check: Use a multimeter to test the battery voltage. A reading below 12.2 volts indicates a low charge. A reading close to zero suggests a dead battery. If your motorhome has multiple batteries (house and chassis), check both.
Corrosion on Battery Terminals:
Corrosion builds up on battery terminals over time, hindering the flow of electricity. This is especially common in humid or salty environments.
How to Check and Fix: Visually inspect the terminals. Clean them with a wire brush and baking soda solution to remove corrosion. Apply a corrosion inhibitor afterwards.
Bad Battery Connections:
Loose or poorly connected cables can prevent the battery from supplying power to the starting system.
How to Check and Fix: Inspect all battery cables and connections, tightening any loose ones. Ensure the connections are clean and secure.
Faulty Alternator:
The alternator charges the battery while the engine is running. A faulty alternator will leave the battery unable to recharge, resulting in a dead battery after extended storage.
How to Check: Have the alternator tested at an auto parts store or a qualified mechanic. This usually involves a load test to determine its charging capacity.
Low Battery Fluid (Lead-Acid Batteries):
For lead-acid batteries, low fluid levels can reduce their capacity and prevent them from starting the engine.
How to Check and Fix: Check the fluid level in each cell of your lead-acid battery. If low, carefully add distilled water to the appropriate level (never tap water). Note: This step is not applicable to AGM or Gel batteries.
What to Do if Your Motorhome Won't Start After Storage
- Check the Battery: This is your first step. Test the voltage and check for corrosion and loose connections. A simple jump start might be all you need if the battery is just low.
- Inspect Fuses and Breakers: Check the main fuses and circuit breakers in your motorhome's electrical system. A blown fuse or tripped breaker could interrupt the power supply to the starter motor.
- Try a Jump Start: If the battery is low, a jump start might be enough to get your engine running. Ensure you correctly connect the jumper cables to avoid damaging the electrical system. After starting, let the engine run for at least 30 minutes to recharge the battery.
- Check the Starter Motor: If the battery is fine but the engine doesn't crank, the starter motor could be faulty. This requires professional diagnosis and repair.
- Consider the Fuel System: A lack of fuel, a clogged fuel filter, or a problem with the fuel pump can prevent the engine from starting. Check fuel levels and inspect fuel lines for any obstructions.
- Check the Ignition System: Problems with the ignition switch, ignition coil, or spark plugs can also prevent the engine from starting. This generally requires a professional mechanic.
What if the Battery is New and Still Won't Start?
Even a new battery can fail if it has suffered a parasitic drain. This continuous discharge, even while the motorhome is off, will drain the battery over time. A parasitic draw test by a qualified mechanic can pinpoint the cause.
How to Prevent Motorhome Starting Problems After Storage
- Disconnect the Battery: The simplest and most effective way to prevent a dead battery is to disconnect the negative terminal completely before long-term storage. This stops parasitic drains.
- Use a Battery Maintainer: A battery tender or maintainer will keep your battery charged during storage.
- Regularly Check Fluids: Before storage, check all fluid levels, including engine oil, coolant, and transmission fluid.
- Store in a Dry Place: Moisture can damage electrical components and accelerate battery corrosion.
By following these tips and troubleshooting steps, you can significantly reduce the chances of facing a "won't start" situation after storing your motorhome. Remember to consult a qualified RV technician for any issues beyond your skill level.
