Car trouble in Boise
Boise has a semi-arid climate with hot, dry summers and cold winters, so a car here gets both kinds of stress. The National Weather Service describes Boise as semi-arid, with just over eleven inches of rain and melted snow a year at the airport, most of it falling from November through May, and snowfall averaging around 20 inches.
Summer heat
Boise's all-time record high is 111°F, set on July 19, 1960. Hot summers load cooling systems and age batteries, belts and hoses. If the temperature gauge creeps up in traffic, or the AC fades at idle, have the cooling fans and condenser checked. A battery weakened by summer heat often fails on the first cold morning, so a battery test in the fall makes sense.
Salt brine on the highways
The Idaho Transportation Department uses salt-and-sand mixtures and salt brine, sodium chloride in solution, in its winter highway maintenance. Brine clings to the underside of a car and works into seams, speeding corrosion on brake lines, calipers, exhaust parts and suspension hardware. Rinse the underside through the winter. At brake service, ask the shop to look at the lines and caliper hardware, and to clean and lubricate the slides.
Freeze-thaw and potholes
NOAA's engineering weather data for Boise records an average of about 78 freeze-thaw cycles a year. Water that gets into pavement cracks freezes and expands, and repeated cycles break up roads. Potholes are hard on tires, wheels, suspension parts and alignment. If the car pulls to one side, the steering wheel is off-center, or you hear a clunk over bumps after hitting a pothole, have the suspension and alignment checked.
Cold starts
Cold thickens oil and weakens batteries. Use the oil grade your owner's manual specifies for cold weather, and give the engine a moment before driving off hard. If the starter sounds slow on cold mornings, have the battery and charging system tested before it leaves you stranded.
Winter visibility
Snow and road spray mean wipers, washer fluid and a defroster that works. The defroster uses the air conditioning compressor to dry the air, so an AC that doesn't work can mean a fogged windshield in winter.
Dry, dusty summers
Dry summers bring dust. Engine and cabin air filters clog faster on dusty roads; many owner's manuals give a shorter interval for dusty conditions. Ask the shop to check both at every oil change.
Choosing a shop
Ask how the shop diagnoses problems, whether they charge for diagnosis, and whether they'll call you before doing anything beyond the estimate. Ask what the warranty covers, in writing.