Service | Farmington, MO
One ice storm will find the weak spot on any truck or SUV. Run through these seven checks before the first hard freeze in St. Francois County.
Winter here usually isn't months of deep snow. It's a 60 degree afternoon and then freezing rain overnight. Every so often a cold snap parks us in the single digits for a few days. That back and forth is rough on vehicles, and whatever's weak tends to quit on the coldest morning of the year.
A little prep in late October or November heads off most of it. These are the seven things we look at on a Ford before winter. Some you can check in your own driveway.
Quick answer: Before winter, have your Ford's battery tested, confirm the coolant protects against hard freezes, set tire pressure cold and check tread, replace streaky wipers and fill up with winter washer fluid, make sure the heater and defrost work, test four wheel drive on a loose surface, and pack an emergency kit. Most of that fits in one service visit.
Checklist items
Seven, from battery to emergency kit
Tire pressure in cold
Can drop 1 to 2 psi per 10 degrees
Good time to do it
Late October through November
In this post
What Should You Check Under the Hood Before Winter?
Start with the battery and the coolant. Neither one gives you much warning before it fails, and both are quick to test.
1. Battery
Cold doesn't usually kill a healthy battery. It finds the weak ones. A battery that cranked fine all summer can leave you stuck on a frosty January morning, and a quick test will show whether it's got enough left for winter. While the hood's up, look for white or green crust on the terminals and make sure the battery's held down tight.
If the battery's getting older or starts have felt slow lately, get it tested before the first cold snap instead of after. Ford Mobile Service can test or replace it at your house or office, depending on distance and availability.
2. Coolant
Coolant keeps the engine from overheating in summer and freezing in winter. The mix needs to protect well below anything we see here, and the type has to match what Ford specifies for your engine. Mixing types can cause trouble. Check your Owner's Manual or just let a technician handle it.
- Check the level in the reservoir with the engine cold, never with it hot.
- Look for crusty residue around hoses, the radiator and the water pump area.
- Ask for a freeze protection test during your fall service visit.

Why Does Tire Pressure Drop When It Gets Cold?
Air contracts as it cools. So your tire pressure drops on its own as fall turns to winter, even if there's no leak.
3. Tires and pressure
Goodyear says pressure can drop 1 or 2 psi for every 10 degrees of temperature change. That's why the tire light so often pops on the first cold morning of fall. Low tires don't grip as well, and they wear faster.
Set pressure to the number on the label inside the driver's door jamb, not the maximum printed on the tire sidewall, and check it in the morning before you drive. Look at the tread while you're down there, too. Tires that felt fine on dry summer roads can slide around on wet leaves and black ice.
Farmington driver tip
Bridges and overpasses on US 67 and MO 32 freeze before the road around them. On cold mornings, figure the bridge over the Big River or any creek crossing is slick, even if the rest of the road just looks wet.
Set pressure to the number on the label inside the driver's door jamb, not the maximum printed on the tire sidewall.
How Do You Keep Your Windshield Clear in an Ice Storm?
Mostly it's good blades and washer fluid that won't freeze. A defroster that blows good and hot helps a lot too.
4. Wipers and washer fluid
Summer heat is hard on wiper blades. If yours streak or chatter, replace them before the salt trucks come out. Fill the reservoir with a winter washer fluid rated below freezing. Summer fluid or plain water can freeze in the lines.
Don't use the wipers to break ice off the glass. Scrape and defrost first, then turn them on. Frozen blades tear fast, and it's hard on the wiper motor.
5. Heater and defrost
On a cool fall morning, run the heater and every defrost setting. If the heat's weak, the fan only works on some speeds or the windows fog and won't clear, get it checked now. Sometimes it's just a clogged cabin air filter, which is a quick swap.
On equipped vehicles, the Ford app (formerly FordPass) lets you start the engine from the kitchen so the defroster gets a head start before you walk outside.
Book a Winter CheckSee Service Specials
How Should You Test Four Wheel Drive Before It Snows?
Test it on a loose surface while it's still mild out, so there's time to fix anything you find.
6. Four wheel drive
Plenty of trucks around here go months without ever shifting into four wheel drive. You don't want to find out it's not working on an icy hill on a gravel county road.
Find a loose surface
Use a gravel lot or dirt drive, not dry pavement. A lot of part time four wheel drive systems aren't meant for dry, hard surfaces.
Shift into four wheel drive
Follow the steps in your Owner's Manual for 4H, 4L or Auto mode, and watch for the indicator on the instrument cluster.
Drive a short loop
Listen for clunks, grinding or binding, and make sure the indicator confirms each mode.
Shift back and confirm
Return to two wheel drive and make sure the indicator goes out.
If the indicator flashes or the system won't engage, have it checked before winter. Your maintenance schedule also lists transfer case and axle fluid intervals for your model.

What Belongs in a Winter Emergency Kit?
Keep the tank close to full and keep a few basics behind the seat.
7. Emergency kit
An ice storm can close roads and leave you sitting for hours. NHTSA recommends keeping the tank close to full in winter and carrying these:
- A snow shovel, broom and ice scraper
- Sand or kitty litter for traction if you get stuck
- Jumper cables, a flashlight and warning devices such as flares or reflective triangles
- Blankets for warmth
- A phone and charger, water, food and any medicine you need
If you drive back roads between Farmington, Potosi or Ironton, throw in gloves, a hat and boots. Cell service can be thin out there, and so can traffic.
Don't wait on these
Slow cranking or a battery warning. Weak starts in fall usually turn into no starts in winter.
Temperature gauge climbing or a sweet smell. Low or leaking coolant can overheat an engine any time of year.
Four wheel drive warning or flashing indicator. Have it diagnosed before you need it on ice.
Windows that fog and won't clear. You can't drive safely if you can't see out.
Our Ford Mobile Service technicians can handle batteries, wipers, fluids and filters, tire rotations and diagnostic scans at a location you choose, depending on distance and availability. The rest fits into one visit at 5019 Flat River Road.
Book it your way
Schedule online, in the Ford app, or by phone at 573-430-1693. Service hours are 8:00 AM to 5:00 PM Monday through Friday, closed noon to 1:00 PM. Ask how on time maintenance keeps Warranty Forever in force.
Battery and Coolant
Should I get my Ford battery tested before winter?
We'd do it, especially if the battery's a few years old or starts have felt slow. A weak one that gets by in warm weather often quits on the first hard freeze.
How do I know if my coolant is ready for winter?
A technician can test freeze protection in about a minute at a service visit. The level you can check yourself, at the reservoir, with the engine cold.
Can I add any coolant to my Ford?
Use the coolant type Ford specifies for your engine, listed in the Owner's Manual. Mixing types can cut protection and cause cooling system trouble.
Tires and Traction
Why does my tire pressure light come on when it gets cold?
Cold air takes up less space, and pressure can drop 1 or 2 psi for every 10 degree swing. Fill to the door jamb number with the tires cold and the light should go off.
What tire pressure should I run in winter?
Use the pressure listed on the label inside the driver's door jamb, checked before driving. The number on the tire sidewall is a maximum, not a target.
Do I need winter tires in Southeast Missouri?
Most people here do fine on good all season or all terrain tires with healthy tread. If you're on steep, unplowed roads every day, ask us about dedicated winter tires.
Visibility and Comfort
When should I replace my wiper blades?
Once they start streaking or skipping spots. Fall's a good time, since summer heat has already hardened the rubber.
What washer fluid should I use in winter?
Get one rated for below freezing. Plain water or summer fluid can freeze up in the lines.
Why does my Ford's windshield fog up in winter?
Moisture in the cabin condenses on cold glass. The defrost setting helps, and a clogged cabin air filter or a heater problem will make it worse.
Four Wheel Drive
How often should I use four wheel drive?
Shift into it now and then on a loose surface so it gets some use, and always before winter. Your Owner's Manual explains the modes on your model.
Can I drive in 4H on dry pavement?
A lot of part time systems aren't designed for dry pavement and can bind up. Auto modes on some Fords work differently, so check your Owner's Manual.
What does a flashing four wheel drive light mean?
Usually the system didn't finish a shift or it found a fault. Get it diagnosed before you need it on snow or ice.
Scheduling Winter Service
How long does a winter check take?
The basic checks fit easily into a routine visit like an oil change. Anything beyond that depends on what the technician finds.
Can Ford Mobile Service do winter prep at my house?
Mobile Service covers batteries, wipers, fluids and filters, tire rotations and diagnostic scans, depending on distance and availability. Four wheel drive diagnosis is handled at the store.
How do I book a winter service visit?
Schedule online, through the Ford app, or call 573-430-1693. The service center is open weekdays from 8:00 AM to 5:00 PM, closed for lunch from noon to 1:00 PM.