United States guidance50 states + DC context

Cooling is not keeping up

Your AC is running but not cooling. What should you check?

Protect people first. If indoor heat is becoming dangerous, move high-risk occupants to a safer cool location and use emergency or medical guidance as needed. A carbon-monoxide alarm, suspected gas odor, smoke, burning odor, sparks, repeated breaker trips or water near energized equipment ends troubleshooting: leave or keep clear and contact the appropriate emergency, utility or electrical help.

When conditions are safe, record the equipment type, thermostat display/mode/setpoint, whether only the fan or both indoor and outdoor sections run, filter condition, open supply and return paths, visible ice or water, and when comfort changed. Do not open panels, reset a breaker repeatedly, handle refrigerant or assume one observation identifies a compressor, capacitor, thermostat, duct or charge problem; persistent loss of cooling needs model-aware inspection.

Put safety before diagnosisHeat exposure and CO, gas, fire and electrical warnings take priority over restoring cooling; never open equipment or handle refrigerant.

Need HVAC help?Confirm request and continue to call

Location changes the boundary, not the evidence

Where is the property?

Choose a state and optionally add a city and ZIP. This does not create a separate location page; it makes the limits of the answer visible.

State or District of ColumbiaCity or community

Choose a suggestion to fill the state, or keep typing any U.S. community.

Property ZIP code

U.S. national guidance

What changes after you choose a location?

Choose a state to make the geographic boundary explicit.

A ZIP helps identify possible HVAC service areas and utility territories, but it does not prove jurisdiction, address-level coverage or an available qualified HVAC technician.

Applies nationallyThe safety and observation sequence on this page is general U.S. guidance.

Must be confirmed locallyEmergency resources, adopted mechanical and electrical codes, permits, contractor licensing, climate loads, utility programs, prices and provider availability require current evidence for the exact property.

Separate life safety, system behavior and comfort symptoms

Which situation best matches the home?

Air moves but does not feel cool

Fan operation does not prove that the cooling cycle is operating or identify why it is not.

Notice next: Record thermostat call and indoor/outdoor equipment behavior.

Little or no air reaches rooms

Filter, air paths, ducts, blower and coil conditions remain different possibilities.

Notice next: Note whether the issue is one room or the whole home without opening equipment.

Ice or unusual water is visible

Ice changes the safe response but does not reveal whether airflow, coil or refrigerant conditions caused it.

Notice next: Stop cooling, do not chip ice and arrange evaluation.

Safe observation

What should you record before the call?

A short, factual description helps the next professional choose the right first inspection without treating a symptom as proof.

These checks route the next step; they do not diagnose a component, airflow quantity, refrigerant condition or repair.

What to record

System type, brand/model if safely visible and current operating mode.
Thermostat display, setpoint, fan setting and call indication.
Indoor fan, outdoor unit, whole-home versus room pattern and duration.
Filter condition, unobstructed registers/returns, visible ice or water.
Heat exposure, CO/gas, smoke, odor, sparks and breaker warnings.

Stop and get appropriate help

Anyone is at risk from dangerous heat or has concerning symptoms.
A CO alarm, gas odor, smoke, burning odor, sparks, shock or repeated breaker trip is present.
Equipment is iced, leaking near electrical parts or requires panel removal to continue.

Move from information to action

Who is the useful next contact?

Emergency, medical, fire or gas utility help

Use first for dangerous heat, CO alarm/symptoms, suspected gas, fire or immediate danger.

Qualified electrician or emergency electrical authority

Use for sparks, shock, burning electrical odor, damaged wiring or recurring breaker trips.

Qualified HVAC technician

Use for persistent no-cooling, ice, water, internal equipment, refrigerant or measured-airflow evaluation.

Check local call availability

Want an HVAC professional to inspect the heating or cooling concern?

This guide can help organize the symptoms, but it cannot inspect the property or confirm the repair. Confirm the request details to prepare a call that checks whether a participating provider can accept a new new residential HVAC or AC service request.

Describe what is happening, where you notice it, and when it began.
Share only normal-control and visible observations; do not open panels or keep unsafe equipment running.
Ask what the visit includes before authorizing work.

Confirm the request, then continue to call

HVAC-service availability and job acceptance are confirmed on the call.

Call Home Help is not the service contractor. If a connection becomes available, calling connects you with a participating third-party provider and we may receive compensation. Availability and job acceptance are confirmed on the call.

Short answers

Questions people ask before the call

Does warm air mean the refrigerant is low?

No. Several system, airflow, control and load conditions can produce the same symptom; refrigerant work requires proper evaluation.

Should I keep resetting the breaker?

No. A repeated trip is a stop condition, not a troubleshooting method.

Can a dirty filter be the whole answer?

A filter is one observable factor. Its condition does not prove the complete cause or that replacing it will restore cooling.

Sources and boundaries

What supports this guide?

NOAA National Weather Service — Understanding Heat AlertsNational heat-alert actions to use a cool place, hydrate, reduce exposure and locate a cooling shelter or air-conditioned alternative when needed. Scope: national. Confirm address-specific requirements with the relevant local authority or qualified professional.
U.S. Department of Energy — Energy Saver 101: Everything You Need to Know About Home CoolingNational central-cooling system context plus filter, thermostat, not-cooling and limited-airflow branches without property diagnosis. Scope: national. Confirm address-specific requirements with the relevant local authority or qualified professional.
ENERGY STAR — Maintenance ChecklistSeparation of basic filter observations from professional controls, electrical, condensate, coil, refrigerant, airflow and combustion checks. Scope: national. Confirm address-specific requirements with the relevant local authority or qualified professional.
U.S. Department of Energy Building Science Education — HVAC Proper Installation of FiltersNational filter and return-air context, including the airflow effect of a dirty or clogged filter, without diagnosing the remaining system. Scope: national. Confirm address-specific requirements with the relevant local authority or qualified professional.
U.S. Environmental Protection Agency — Section 608 Technician CertificationFederal boundary for activities that may release regulated refrigerants and applicable technician certification. Scope: national. Confirm address-specific requirements with the relevant local authority or qualified professional.

Educational information only: this page cannot inspect the property, diagnose hidden work, provide legal advice, quote a repair or promise service availability.

Sources support the general guidance shown here. Address-specific rules, responsibility, price and availability still require current local confirmation.

If conditions are unsafe or rapidly worsening, stop troubleshooting and contact the appropriate emergency service or qualified local professional.