No-Cooling Checker: Heat Risk & AC Repair Planner

This private, on-page tool helps you evaluate heat risk, document what your AC is doing, and organize information a contractor will need. It does not diagnose the fault or replace professional assessment. If anyone is showing signs of heat illness, move them to a cool place and call 911 immediately. The tool works offline and saves nothing—refresh or close the page and your entries are gone.

Phoenix, ArizonaResearch checked July 31, 2026Source-linked educational guide — verify current details and obtain a professional assessment when needed

Quick, low-risk steps

Check for heat illness symptoms and move vulnerable people to a safe, cool location if needed.

Confirm the thermostat is set to cool and the temperature is below room temperature.

Inspect the accessible air filter and replace if visibly dirty.

Record the exact model number and any error code displayed on the unit.

Use the checklist below to note what you observe, then contact a licensed contractor.

How to Use This Checklist

This tool is a private worksheet that lives only in your browser. It does not transmit or store any information. Work through each section in order, starting with heat safety. The goal is to gather clear, factual observations you can share with a licensed HVAC contractor.

The checklist is not a diagnostic tool and cannot tell you what is wrong. It helps you organize what you see, hear, and smell so a professional can prepare for the service call. Never open electrical panels or handle refrigerant yourself.

Complete the heat-risk check first—safety comes before equipment.
Note the exact thermostat reading and settings.
Describe any unusual sounds, smells, or visible ice.
Record the model number and any error code from the indoor or outdoor unit.
Use the notes field to capture anything else you want to tell the contractor.

Heat-Risk Assessment

Extreme heat can be dangerous, especially for older adults, young children, and people with certain health conditions. If anyone in the home feels dizzy, nauseous, confused, or has hot, dry skin, move them to a cool location and seek emergency medical help.

Even if no one feels ill, a home without cooling can become unsafe quickly when outdoor temperatures are high. Identify a cooled public space such as a library, community center, or a friend's home where you can go if needed.

Is anyone showing signs of heat exhaustion or heat stroke?
Do you have a safe, cooled place to relocate if the indoor temperature rises?
Are there infants, elderly, or medically vulnerable people in the home?
What is the current indoor temperature and humidity level?

AC Fault Evidence

Before calling for service, collect simple observations that help a contractor understand the situation. Check the thermostat first: is it set to cool, and is the displayed temperature above the set point? A blank screen may indicate a power or battery issue.

Look at the indoor and outdoor units without opening any panels. Note whether the outdoor fan is spinning, if there is ice on the refrigerant lines, or if you hear any grinding, squealing, or banging. Write down any error code flashing on the unit's display.

Thermostat setting and displayed temperature.
Is the indoor fan running? Is the outdoor unit making any sound?
Visible ice on pipes or the indoor coil.
Unusual smells: electrical, burning, or musty.
Error code or blinking light pattern on the unit.

Contractor Discussion Planner

When you contact a licensed HVAC contractor, the information you gathered will help them prepare. Ask about their diagnostic fee, whether they charge by the job or by the hour, and what is included in the initial visit.

Discuss the scope of work clearly: will they check refrigerant levels, electrical connections, and the drain line? Ask if a permit is needed for your repair and whether the quote includes parts, labor, and any required refrigerant. Get terms in writing before work begins.

What is the diagnostic charge and what does it cover?
Will the quote include parts, labor, refrigerant, and permit fees?
How do they handle after-hours or weekend calls?
What warranty is provided on parts and labor?
Ask for a written estimate before authorizing work.

What homeowners ask next

Is this tool a substitute for a professional diagnosis?

No. This checklist helps you organize observations and safety steps. Only a licensed HVAC contractor can diagnose and repair your system safely.

What if I see ice on the air conditioner?

Turn the system off at the thermostat to let it thaw. Do not chip at the ice. Ice can indicate low refrigerant or airflow problems, which require professional service.

Can I add refrigerant myself?

No. Federal law requires EPA-certified technicians to handle refrigerants. Homeowners should never attempt to add or remove refrigerant.

Need an on-site professional?

Use the guide and worksheet first so you can describe the situation and compare the full scope. A referral is optional; you can also contact a licensed local provider directly.

Referral matching is not enabled yet.

We have not enabled a provider route for this site. Use the checklist to contact and verify local providers yourself; urgent hazards should go to the appropriate emergency or public service.