The Colorado Spring Problem

No other state swings between heating and cooling as aggressively as Colorado does in spring. A typical March or April week might look like this: Monday 72°F and sunny, Tuesday 65°F, Wednesday snow and 35°F, Thursday 28°F overnight, Friday back to 68°F. Your HVAC system needs to handle both heating and cooling — sometimes in the same day.

Recommended Settings

When You're Home

Set your thermostat to 68-70°F. This is comfortable for most people and lets your system switch between heating and cooling as needed. If you have a heat pump, this is especially important — heat pumps are most efficient at maintaining a steady temperature rather than recovering from big swings.

When You're Sleeping

Drop to 65-67°F at night. Most people sleep better in a slightly cooler room, and running less overnight saves money. Your system can easily recover 3-5 degrees in the morning.

When You're Away at Work

Set back to 60-65°F in spring. Don't turn the system off completely — Colorado spring afternoons can hit 75°F+ and heat up your house, then drop below freezing overnight. A moderate setback saves energy while protecting your home from temperature extremes.

The "Auto" vs "Cool" vs "Heat" Decision

In spring, use "Auto" mode if your thermostat has it. This lets the system switch between heating and cooling automatically based on your set temperature. You don't have to manually toggle between heat and cool every time the weather changes. Set it to 69°F on Auto and forget it — the system handles the rest.

If your thermostat doesn't have Auto mode, you'll need to manually switch between Heat and Cool as the weather shifts. Keep an eye on the forecast and switch the night before a big temperature change.

Smart Thermostat Advantage

A smart thermostat (Nest, Ecobee, Honeywell Home) is particularly valuable in Colorado's unpredictable spring. These devices learn your schedule and preferences, automatically adjust for weather changes, can be controlled from your phone when weather shifts unexpectedly, and show you energy usage so you can optimize. A smart thermostat typically saves $100-$150 per year on energy and pays for itself in 1-2 years. Installation takes about an hour.

The deadband setting: If your thermostat has a "deadband" or "temperature swing" setting, set it to 2-3°F. This prevents the system from constantly switching between heat and cool on mild days when the indoor temperature hovers right around your setpoint. Without a deadband, your system might heat to 70°F, then immediately switch to cooling, then back to heating — wasting energy and wearing out your equipment.

When to Schedule Your Spring AC Tune-Up

Before you need your AC for the first time, have it serviced. March and April are ideal — technicians have open schedules, and you'll catch any issues before the first hot day. A spring tune-up includes checking refrigerant levels, cleaning the outdoor coils, testing the capacitor and contactor, and verifying your thermostat calibration. It takes about an hour and can prevent a breakdown on the first 90-degree day in June.