How to Prepare for an AC Repair Call and Compare Written Proposals

Write Down What You Know Before Anyone Visits

A technician's first visit goes better when you can describe what happened in your own words. Before calling anyone, write down when the problem started, what the system does or does not do, any noises or smells you noticed, whether the thermostat responds, and whether the problem is constant or intermittent. Note the location of the indoor and outdoor units and any recent work done on the system, including filter changes or prior repairs.

Also gather identifiers. The outdoor unit usually has a manufacturer's plate with a model and serial number, and many indoor units have a similar label. Photograph those plates and any visible water, ice, or damage. This record helps every company you contact understand the same starting point, which makes their proposals easier to compare later.

• Where exactly is the indoor unit, the outdoor unit, and the thermostat located in my home?
• Is there any service history, manual, or prior invoice for this system that I should have ready?
• Has anything near the equipment changed recently, such as renovations, landscaping, or water in the area?

What to Ask in the First Phone Call

The first call is for logistics and boundaries, not diagnosis. Ask how the company handles a diagnostic visit: whether there is a diagnostic charge, what it covers, when it is due, and whether it is applied toward repair work if you proceed. Companies differ here. Some networks describe quoting by the job rather than by the hour; ask any company you call to explain in plain terms how their pricing structure works for a job like yours.

Confirm who will actually perform the work. Large networks such as One Hour Heating & Air Conditioning and Aire Serv operate through locally owned locations, so availability, staff, and service terms can vary by address. Both companies direct homeowners to their official websites to confirm coverage for a specific zip code, and that check matters: a national brand name does not tell you whether a location serves your home.

• Is there a diagnostic charge, what does it include, and does it credit toward a repair if I approve one?
• Do you service my exact address, and who employs the technician who would come out?
• Will I receive the findings and any proposal in writing before I have to decide anything?

Ask for Fault Evidence, Not Just a Conclusion

A responsible proposal explains what evidence supports the recommended repair. You are not asking the technician to teach you HVAC repair; you are asking what they observed, what test or reading led to their conclusion, and which part they believe is involved. A written summary of the fault, the affected component, and the reasoning gives you something concrete to compare if a second company proposes something different.

If two proposals diagnose the same symptom differently, that is not automatically a red flag, but it is a reason to ask each company directly about the discrepancy. Comparing the stated fault evidence is one of the most revealing parts of a side-by-side review, and it is impossible to do from memory or from a verbal quote.

• What did you observe or measure that points to this component as the cause?
• Could more than one fault produce this symptom, and how would you rule the others out?
• Can the fault findings and photos be included in the written proposal?

Parts, Compatibility, and Refrigerant Scope

When a proposal names a part, it should also say whether that part is new or used, whether it is original equipment or an approved substitute, and why the substitute is compatible with your specific system. A generic line item such as replacement part with a number is hard to compare; a line that names the component and its match to your equipment is not.

Refrigerant work deserves its own attention. If the proposal involves refrigerant, ask what type the system uses, whether the work includes locating and repairing a leak or only adding material, and how a leak would be verified as fixed. Recharging a system that has an unrepaired leak is a different job from repairing the leak, and the proposal should make clear which one is being offered.

• Is the proposed part new, and is it original equipment or a compatible alternative?
• Does this proposal include finding and repairing a leak, or only adding refrigerant?
• How will you verify after the work that the refrigerant issue is resolved?

Electrical, Drain, Labor, and Access Scope

Air conditioning repairs often touch more than the failing component. Ask whether the proposed price includes the electrical work involved, such as replacing contactors, capacitors, or wiring connected to the repair, and whether any drain line or condensate work is included or billed separately. These items are common sources of difference between proposals that otherwise look similar.

Labor and access should be explicit. If equipment is in a tight attic, crawlspace, or roof location, ask whether the quoted labor assumes that access and whether difficult access changes the price. Also ask whether a permit is required for this work in your jurisdiction, who pulls it, and whether the permit cost appears in the proposal. A company that states a permit is not needed should be able to explain why.

• Does this price include all electrical and drain line work related to the repair?
• Does the labor estimate account for the actual access to my equipment?
• Is a permit required for this job, who obtains it, and is it included in the written price?

Warranty, Commissioning, and Documentation

A complete proposal states what happens after the repair. Ask what warranty applies to the parts and to the labor, who honors each, how long each lasts, and what you must do to keep it valid. If the company and the part manufacturer each carry separate obligations, the proposal should say so.

Ask how the technician will confirm the system works correctly when the job is finished and what documentation you will receive. A written record of the work performed, the parts installed, and the verification steps gives you a baseline for future service and something to reference if a warranty question arises later. Some published service descriptions mention things like upfront pricing or punctuality, but marketing language on a website is not a substitute for these terms in your own paperwork.

• What warranty covers labor, what warranty covers the part, and what could void either?
• What checks will you perform to confirm the system is operating correctly before you leave?
• What written documentation will I receive when the job is complete?

How to Ask for Missing Details

When a proposal leaves something out, request the missing item in writing rather than accepting a verbal fill-in. A simple pattern works: name the line item, ask what it includes, and ask for the answer to be added to the document. For example: please add to the proposal whether drain line work is included, and if not, how it would be priced if needed. Then ask for a revised written version rather than an email summary of a phone call.

If a company resists putting scope, warranty, or permit details in writing, treat that resistance as information. A revised, complete proposal is a normal request, and companies that provide one are easier to compare and easier to hold to their terms.

• Can you send a revised written proposal that includes the item we discussed?
• If this item becomes necessary during the job, how will it be priced and approved?
• Who should I contact if a question about this proposal comes up before I decide?

Confirm Coverage Through Official Channels

Before investing time in proposals, confirm that each company actually serves your address. Both One Hour Heating & Air Conditioning and Aire Serv publish location and contact information on their official websites, and both direct homeowners to check coverage for their specific zip code there. One Hour's site offers a zip code lookup and a locations page, and Aire Serv's site lists its contact page. Use those pages, or the phone numbers published on them, to verify service in your area.

These companies also publish lists of the services they offer, such as air conditioning repair, heating, thermostat work, ductwork, air quality services, and emergency HVAC service in One Hour's case. Treat those lists as a starting point for your questions, not as confirmation of what your specific repair requires. The written proposals you collect are where the details for your home get settled.

• Does your location confirm service for my zip code through your official website?
• Which of your published services apply to the problem I described?
• What is the local office's contact information if I need to follow up?

Your proposal comparison checklist

• Company name, local location, and confirmation that they serve your address
• Diagnostic charge: amount, what it covers, whether it credits toward a repair
• Written description of the observed fault and the evidence behind the diagnosis
• Named part: new or used, original or compatible substitute, and why it fits your system
• Refrigerant scope: type, whether leak repair is included, and how the fix is verified
• Electrical scope: contactors, capacitors, or wiring included in the price
• Drain or condensate work: included or billed separately
• Labor hours and whether equipment access (attic, crawlspace, roof) is accounted for
• Permit status: whether one is required, who obtains it, and its cost
• Warranty terms for labor and for parts, including duration and what voids them
• Commissioning steps: how the technician verifies the system works when finished
• Documentation you will receive: invoice, work summary, part records, permit paperwork
• Total written price and the conditions under which it could change
• Change-order process: how additional work is approved before it is performed
• Contact person for questions before you sign or approve

Provider sources and limitations

These first-party websites support the directory’s provider identities and published contact routes. The preparation questions above are editorial suggestions, not a diagnosis, repair specification, treatment recommendation, or professional review.

• Aire Serv official website — checked 2026-09-06
• One Hour Heating & Air Conditioning official website — checked 2026-09-06