DENVER GUIDE

After hail hits a Denver condenser

The storm has passed, the car in the driveway looks dimpled, and the outdoor unit’s fins no longer look like a comb. Hail on a condenser is a record-keeping problem before it is a shopping problem. These notes cover what to photograph from the ground, how a bent fin differs from a punctured coil, and what to ask a technician to write down if you are going to talk to an insurer. They do not say what a policy covers.

By Mike Maziarz · Sources checked October 12, 2026 · How we write these guides

Photograph before anyone straightens a fin

Stay inside while lightning is still around. When the storm is over and the yard is safe to walk, photograph the condenser before anyone touches it. All four sides, from the ground. The top, if you can see it without climbing. The fins up close, and a wider shot that shows the cabinet, the pad, and any dents. If the car, the roof edge, or the neighbor’s unit is also marked, photograph those too so the date has context. Leave the time and date on the photos. Do not comb the fins first and photograph second.

Do not hose the coil to 'see if it still works' before you have the pictures. Water hides oil stains and turns a dry dent into a wet one. Do not bend fins back with a knife, a screwdriver, or a fin comb from a hardware aisle until you know whether you are filing a claim and whether a technician needs to see the damage as the storm left it. The do-it-yourself page already draws this line: bent metal is not a kitchen-knife job. Hail makes that line stricter, because the photos are part of the record.

If the disconnect is a switch you already know, and you smell or hear something wrong, shut the outdoor unit off and leave it off. A unit that is only ugly can wait for daylight and a technician. A unit that is hissing, dripping oil, or buzzing with the fan seized should not be switched back on to 'test it.' Write down what you heard before you silence it. The air conditioner not cooling page is the ordinary no-cool visit. This page starts when the weather put the dents there.

Flattened fins are not a punctured tube

Fins are the thin metal that lets air cross the coil. Hail flattens them. Airflow drops, the unit works harder, and the house may cool poorly or not at all. A technician can sometimes comb lightly damaged fins. Heavily mashed fins, fins torn off the tubes, or a cabinet so dented that the fan strikes the metal are a different repair. You will not know which one you have from the sidewalk. You can say whether the fins still show gaps you can see through, or whether they look like a single crushed sheet.

A punctured tube is a leak. Clues you can see without gauges: an oily dust pattern on the coil that was not there last week, a hiss that was not there before the storm, ice on a line after a short run, or the unit shutting itself off. Those clues are not a measurement of charge. They are a reason to stop. A coil that is only dirty from cottonwood is the ordinary outdoor-unit page. A coil that is dented and oily is this page. Say both facts if both are true.

The fan, the top grille, and the control cover take hail too. A fan blade that wobbles, a grille pushed into the blade, or a cover that no longer keeps rain out of the electrical side is part of the same storm and a separate line on the notes. Do not spin the fan by hand to 'free it' if the power might still be on. Do not run the unit with a grille driven into the blade. Photograph the contact point and leave the disconnect off.

Do not feed a damaged coil a can

The U.S. Environmental Protection Agency tells homeowners that a low charge is a leak to find and repair, not a top-off, and that knowingly venting refrigerant while servicing equipment is illegal. A hail puncture is one way a coil starts that leak. Adding a store can does not close the hole, and attaching gauges is technician work under the EPA’s Section 608 rules. The refrigerant basics page is the boundary in ordinary weather. After hail, the boundary is the same and the leak is easier to picture.

Ask the company whether the person coming holds Section 608 certification before anyone connects a hose. You can ask to see the card. You do not connect the hose yourself to 'save the trip.' If refrigerant is actively releasing, leave the area around the unit and do not sniff the coil to identify the gas. Shut the disconnect if you know that switch, keep people and pets away, and let the technician take the ports.

A system that still cools after the storm may still be damaged. Fins can be bent and the charge can still be in the system, for now. Run it only if nothing is hissing, nothing looks oily and fresh, and the fan turns freely with the power off when you look from outside the grille. If you are unsure, leave it off until someone looks. A hot afternoon is uncomfortable. A punctured coil that keeps running is how a small leak becomes an empty system.

What the technician should write down

If you are filing an insurance claim, ask the technician for a written description of what they saw, in words a stranger can read. Separately: fin damage, tube or coil damage, fan or grille damage, electrical damage, and whether refrigerant was lost. Ask them to say what they repaired, what they only photographed, and what they recommend replacing. This page does not say what a policy pays, how fast you must file, or which dents count. The insurer and the policy do that. Your job is not to let the evidence get combed away before anyone who needs to see it has seen it.

Ask for their photos as well as yours. A close shot of a puncture and a wide shot of the cabinet belong in the same set. Get the model and serial numbers from the nameplate without removing a live cover. If they recover refrigerant, ask what they recovered and where it was documented. If they say the coil is 'totaled,' ask what test showed a leak and whether a coil repair was even available for this model. A speech in the driveway is not the document.

Do not sign a replacement contract because the lawn is still full of hail and the house is warm. If the unit is unsafe to run, leaving it off is the safety step. Choosing the new equipment can wait until you have the written damage notes and, if you are claiming, until you know what the insurer wants to see. The cost factors page lists what moves a bill, access and parts and refrigerant work among them, without printing prices. Hail does not create a price list this site will invent.

Repair or replace is about the coil

A fin comb on a coil that still holds its charge is a repair until someone shows it is not. A coil that cannot be sealed, a fan that struck the housing, or parts that are no longer made can push the visit toward replacement. The repair or replace page keeps that fork tied to the defect. Age of the nameplate is context. It is not, by itself, the reason the storm 'means a new system.' Ask what failed inside this cabinet.

Replacing the outdoor unit without the indoor coil is a match question, not a hail question. Ask whether the refrigerant, the metering device, and the indoor coil are compatible with whatever they propose. Do not accept 'we always change both' without the reason on this house. If the indoor coil was not hit, say so. If water stained a ceiling because a different problem showed up the same week, keep that stain on its own line so it is not folded into the hail story.

Get a second look if the first visit jumped to replacement before anyone documented the leak or the fins. Leave the unit off in the meantime if the first technician said it was unsafe. Do not run it as your own tie-breaker. Two written descriptions of the same coil are how you compare scope. Two speeches are not.

Why the storm season is not a surprise

The National Weather Service office in Boulder, writing up June 2025, said June is typically the most active severe-weather month of the year in this area, and that month included thunderstorms with large hail. A separate National Weather Service account of May 8, 2017 describes a supercell that produced large, damaging hail across Denver and western suburbs including Arvada, Lakewood, and Wheat Ridge, with damage to cars, homes, and businesses. Hail here is a warm-season fact those pages document. It is not a statistic this site will stretch into a ranking.

That is why the photographs and the shutdown steps are worth knowing before the next May and June, not the morning after, when everyone with a dented condenser is calling at once. A condenser that survives this year still sits in the open. A cover sold for winter is not a hail shield you invent by tossing a board on the fan. Airflow and a falling board are their own damage. If you want a hail screen, ask a technician whether one is made for this cabinet. Do not build one out of hardware cloth the afternoon of the warning.

After the unit is repaired or replaced, keep the storm photos with the invoice. The next hail day, you will want to know what the fins looked like before. The ordinary maintenance on the seasonal page, clearing debris and keeping the fan free, still applies. It does not undo a punctured tube. If a later no-cool visit has nothing to do with dents, say that too, so the hail file does not swallow an unrelated capacitor.