Spring repair in Lehi, Utah

Elevation is the quiet driver: Lehi's 4,502 feet buy it 96.4 freezing crossings a year, and each one flexes the coil like a small unpaid cycle. A door used twice a day and a door used ten times age differently — but both springs live in the same Lehi winter.

Cold adds a second effect: low temperature reduces the fracture toughness of spring steel, so a fatigued spring is likeliest to let go on the first lift of a freezing morning. That is when Lehi spring calls cluster — 91% of the year's freeze–thaw days here fall between November and March.

The housing vintage stacks on top — half the homes in Lehi were standing by 2005, so a wave of original builder-grade springs is arriving at this climate's 5–7-year limit about now.

The 25,000-cycle upgrade adds $80 to $150 to a replacement and multiplies expected life by roughly 2.5. At Lehi's 96.4 cycles a year of thermal fatigue, that arithmetic tilts firmly toward the upgrade — it converts a 5-to-7-year spring into one that outlasts most ownerships, and it avoids paying the call-out twice.

Fit them as a matched pair, sized to the door's measured weight — in this climate an undersized bargain spring is the shortest-lived spring of all.

The measurements shift town by town: American Fork runs 98.5 freeze–thaw cycles and 5–7 years of spring life; Highland runs 102.1 freeze–thaw cycles and 5–7 years of spring life; and Saratoga Springs runs 96.8 freeze–thaw cycles and 5–7 years of spring life.

Against that backdrop, Lehi holds 96.4 cycles at 4,502 ft with a 2005 median build year — the specific inputs behind every figure above.