HVAC TROUBLESHOOTING GUIDE

Frozen AC Coil: What It Means and What to Do

Ice on an AC system is a symptom, not a normal operating condition.

Call to request heating or cooling service in Littleton.

START HERE

Safe checks before scheduling service

Turn cooling off so the coil can thaw.
Check and replace a badly restricted filter.
Make sure return and supply vents are open.
Do not chip ice from the coil or refrigerant tubing.
After thawing, if freezing returns, schedule diagnosis.

If you encounter exposed wiring, smoke, a gas odor, a carbon-monoxide alarm, or another immediate safety concern, stop troubleshooting and follow the appropriate emergency guidance.

WHEN TO CALL

Move from troubleshooting to diagnosis

If the simple checks above do not resolve the problem, or the same symptom returns, professional diagnosis is usually more useful than continuing to reset or restart the equipment. Describe the symptom and what you have already checked.

WHAT NOT TO DO

Avoid risky shortcuts

Do not bypass switches, defeat safeties, open sealed refrigerant systems, adjust gas valves, or repeatedly reset a breaker that trips. Those steps can create additional risk or obscure the original problem.

LOCAL HVAC HELP

Still having trouble? Call for local HVAC help

Tell us what your heating or cooling system is doing and request service in Littleton.

Call 303-632-9562

RELATED HVAC HELP

Frozen AC Coil: What It Means and What to Do

Safe checks before scheduling service

Move from troubleshooting to diagnosis

Avoid risky shortcuts

Still having trouble? Call for local HVAC help

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