Common problem · Same day

Ice on your AC lines or coil?

Ice on an air conditioner in July looks wrong because it is. It means the coil is colder than it should be, and there are two reasons that happens.

$99 diagnostic, credited to the repair
Same-day across Denver
No overtime fees

Get Help Fast (720) 447-0177

How urgent

Turn it off now, then call. Running a frozen system can kill the compressor.

Call if: It refreezes after thawing
Call if: The airflow is weak even with a clean filter
Call if: You hear hissing at the indoor unit

(720) 447-0177

What it usually is

The causes, most common first.

1

Low airflow

A dirty filter, closed vents, or a failing blower. The coil gets too cold and moisture freezes on it.

A filter swap up to a blower repair
2

Low refrigerant

A leak lowers the pressure and the coil temperature drops below freezing.

Leak repair, then a proper recharge

Every fix gets a written price before any work. The $99 diagnostic is credited toward it.

Try this first

What to check before you call.

If one of these fixes it, great. If not, you’ve saved us five minutes on the diagnosis.

1
Turn the system OFF at the thermostat. Set the fan to ON to speed up thawing.
2
Replace the filter while it thaws.
3
Put towels near the indoor unit; melting ice makes water.

Who we are

Hello. We’re Duality.

Duality Heating and Air LLC is a Denver heating and cooling company run by one licensed technician and the people he trusts. We fix furnaces, ACs, heat pumps, and the air in your home, and we do it the way we’d want it done at our own house. Comfort, in perfect balance.

Denver-based

One technician who lives here, not a call center in another state.
Price in writing

You approve the number before we touch a tool. It never changes.
Fix before replace

We repair what can be repaired and show you both numbers when it can’t.

Questions

AC Frozen, answered.

Can I just add refrigerant?

Refrigerant doesn’t get used up. If it’s low, it leaked. Adding more without fixing the leak is paying for the same problem twice.

From Denver neighbors

HVAC service

Cecilia Gomez
Google review

“Professional, knowledgeable, and incredibly helpful. He took the time to explain everything clearly, answered all of my questions, and made the entire process easy and stress-free. I truly appreciated his honesty, responsiveness, and attention to detail.”
AC repair

Jessica Russman
Google review

“Very honest and reliable. He showed up on time and fixed our old AC after we had several companies try to sell us a new one. We would 1000% recommend Duality to anyone who wants to feel confident they’re dealing with the right company.”

Same-day help