Colorado Homeowners Urged to Winterize Cooling Units

Residents must secure evaporative coolers against freezing temperatures to avoid costly, ineligible insurance claims.

Updated on Oct. 21, 2026 in Insurance

Bold vector editorial illustration of a rooftop cooling unit being covered, representing residential winterization preparations in Colorado. — Colorado homeowners are advised to winterize evaporative cooling systems before the first freeze to avoid costly and potentially non-covered water damage claims. AI Illustration. Upload story photo >

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As temperatures drop toward the October 7 average first freeze date in Denver, Colorado homeowners are being advised to properly winterize their evaporative coolers. Failure to perform this maintenance can lead to frozen, burst pipes that insurers may refuse to cover.

Why it matters

Colorado homeowners insurance premiums have doubled since 2019, and filing small water damage claims can lead to significant future rate hikes. Because standard policies exclude damage caused by deferred maintenance, residents risk denied claims if they do not secure their systems.

The average Colorado homeowners insurance premium hit $4,164 in 2026. This follows a period where the state reported a 115 percent loss ratio in 2023.

The details

Winterizing involves shutting off the water supply, draining lines and reservoirs, disconnecting power, closing the damper, and covering the unit. This process prevents freeze damage, which occurs when residual water in the system expands as temperatures dip below freezing.

2019 served as the base year for comparing insurance premium increases.
2023 saw the state homeowners loss ratio reach 115 percent.
October 7 is the average date of the first freeze in Denver.
September 2026 marked an El Niño sea surface temperature deviation of 1.4°C above normal.
The 2026-2027 winter season is expected to feature early cold snaps and a strong late-season surge.

Market Dynamics

The current insurance landscape in Colorado follows the 1997-1998 El Niño winter pattern, which meteorologists now use as a predictive model. This historical analogue underscores the volatile climate risks that have driven up property premiums across the state.

Homeowners should perform maintenance immediately to avoid the risk of having a water damage claim denied for negligence. Given the high premiums, avoiding small, preventable claims is crucial to keeping individual insurance costs manageable.

The takeaway

Proactive maintenance of home infrastructure is a critical financial strategy in an era of rising insurance costs and strict policy exclusions. Homeowners should treat winterization as an essential annual task to protect both their property and their insurance standing.