Commercial HVAC Emergency: What to Do When Your Business Loses Cooling

If your business just lost cooling, call (940) 390-5676 now. We respond to commercial HVAC emergencies across North Texas within 2 hours. Emergency commercial repairs cost $500-$5,000+ depending on the problem. While you wait for the technician, check your breaker panel and thermostat first, protect server rooms and food storage areas, and open doors to improve airflow. Do not attempt to restart a system that tripped a breaker more than once.

Your building is 85 degrees and climbing. Employees are miserable. Customers are leaving. If you have a server room, you are watching thousands of dollars in equipment inch toward heat damage. I know the feeling because I get these calls every day in the summer across Frisco, Plano, McKinney, Allen, and Addison.

Here is exactly what to do, step by step, when your commercial HVAC goes down.

Immediate Steps: The First 15 Minutes

Before you call anyone, do these checks. About 20% of the “emergency” calls I get are things the business owner could have fixed in 5 minutes.

1. Check the Breaker Panel

Go to your electrical panel and look for any tripped breakers. A tripped breaker looks like it is in the middle position, not fully on or off. If you find one:

• Flip it fully OFF, then back ON
• Wait 5 minutes
• If it trips again, do not reset it a third time. A breaker that keeps tripping is protecting you from an electrical problem. Forcing it can cause a fire.

2. Check the Thermostat

It sounds obvious but I have driven across town to find a thermostat switched to “off” or set to 85 degrees because someone bumped it.

• Verify it is set to COOL
• Verify the temperature setpoint is below the current room temperature
• Check that the fan is set to AUTO or ON
• Replace the batteries if it is a battery-operated unit (the display might look normal but still not send signals)

3. Check Your RTU Disconnect

Every rooftop unit has a disconnect switch, usually a red-handled lever near the unit on the roof or on the exterior wall. Someone might have turned it off during roof work, inspection, or by accident.

4. Check for Ice

If you can safely access the unit, look for ice on the refrigerant lines or inside the unit. Ice means the system is low on refrigerant or has an airflow problem (usually a clogged filter). If you see ice:

• Turn the system to FAN ONLY (not off, not cool)
• Let it run for 2-3 hours to melt the ice
• Check the filter. If it is clogged, replace it
• If it freezes again after thawing, call a technician

5. If None of That Works, Call a Technician

Contact us at (940) 390-5676. When you call, have this information ready:

• Building address and which unit is down (if you have multiple)
• Building type (office, restaurant, retail, medical)
• What you have already checked
• Whether the unit is making any unusual sounds
• How long cooling has been out

This information saves time and helps us show up with the right parts.

Priority Triage by Business Type

Not every building can tolerate the same wait time. Here is how I prioritize commercial emergency calls.

Critical (respond within 1-2 hours)

Server rooms and data centers: Equipment starts overheating at 80 degrees. At 90 degrees, hard drives and servers begin failing. The cost of server damage ($10,000-$100,000+) dwarfs any emergency repair bill. If you have a server room, this is your top priority.

Food service and restaurants: Health codes require food storage at specific temperatures. Once your walk-in or kitchen area climbs above safe temperatures, you risk spoiled inventory ($2,000-$10,000), health code violations, and forced closure. If you are a restaurant, close the kitchen before you risk a health inspection failure.

Medical and dental offices: Patient comfort and medication storage both require temperature control. Many medications become unsafe above 77 degrees. Patient care cannot continue in a building above 85 degrees.

Urgent (respond within 2-4 hours)

Retail with customers: You will not lose inventory but you will lose customers. Every degree above 78 reduces customer dwell time. At 85 degrees, most customers leave within 5 minutes.

Office buildings: Employee productivity drops significantly above 80 degrees. OSHA does not have a specific indoor temperature maximum, but heat-related illness claims can start at 87 degrees.

Important (respond same day)

Warehouses: If your inventory is not temperature-sensitive, a warehouse can tolerate a few hours without cooling. But employee safety matters, so do not push it past one work shift.

Unoccupied buildings: If nobody is in the building and nothing temperature-sensitive is stored there, this can wait until the next business day. But do not leave a broken system running. Turn it off to prevent compressor damage.

What Emergency Repair Costs for Commercial

Here is what you should expect to pay for common commercial HVAC emergency repairs in North Texas.

Common Emergency Repairs

Repair	Cost Range	Time to Fix
Capacitor replacement	$250-$500	30-60 minutes
Contactor replacement	$300-$600	30-60 minutes
Refrigerant recharge (no leak repair)	$400-$1,200	1-2 hours
Leak detection and repair	$500-$2,000	2-4 hours
Blower motor replacement	$600-$1,500	2-3 hours
Control board replacement	$500-$1,800	1-3 hours
Compressor replacement	$2,500-$5,000+	4-8 hours

After-Hours Surcharges

• Evenings (after 5 PM): $150-$250 surcharge
• Weekends: $200-$300 surcharge
• Holidays: $250-$350 surcharge
• Jupitair after-hours fee: $250

These surcharges are standard across the industry in North Texas. A contractor who does not charge after-hours fees is either building it into inflated repair costs or will not actually show up at 10 PM on a Saturday.

Diagnostic Fee

Most commercial HVAC contractors charge $150-$300 for the diagnostic visit. This covers the technician’s time to identify the problem. At Jupitair, we apply the diagnostic fee toward the repair if you proceed with us.

Temporary Cooling Options

While you wait for repair or replacement, here is how to keep critical areas functional.

Portable Spot Coolers

Portable AC units on wheels that you can place exactly where you need cooling. They are the fastest temporary solution.

• 1-2 ton units: $200-$400/day rental. Good for a single office, server room, or small retail area.
• 3-5 ton units: $400-$800/day rental. Can cool 1,000-2,500 sq ft depending on conditions.
• Where to rent: Several DFW rental companies offer same-day delivery. I can recommend vendors when you call.

Requirements: 120V or 208V power outlet and a way to exhaust the hot air (window, door, or flex duct to exterior).

Temporary Chiller Trailers

For larger buildings that need days or weeks of temporary cooling during a major replacement.

• 10-50 ton trailer units: $1,000-$3,000/day
• Need professional hookup to your building’s air distribution system
• Available from specialty rental companies in the DFW area

Low-Tech Options That Help

• Open exterior doors in early morning to flush hot air out (before 8 AM only)
• Close blinds and shades on sun-facing windows
• Turn off non-essential heat-generating equipment (extra computers, printers, display lighting)
• Set up box fans to improve air circulation
• If you have a multi-unit building, adjust working units to partially compensate for the failed one

How to Prevent Commercial HVAC Emergencies

The best emergency is the one that never happens. Here is what actually prevents commercial HVAC failures.

Get a maintenance contract. This is not a sales pitch. Quarterly professional maintenance prevents 90% of commercial HVAC failures. A $500-$5,000/year maintenance contract costs less than a single emergency repair. Every time.

Change filters on schedule. The number one cause of commercial HVAC failures is dirty filters. I cannot say this enough. Put a recurring reminder on your phone. Buy a 6-month supply of filters so you always have them.

Listen to your system. New noises, longer run times, uneven temperatures, and higher energy bills are all early warnings. Address them during a scheduled service call instead of waiting for a breakdown.

Plan for hail. North Texas gets damaging hail storms regularly. Hail guards on your RTU condenser coils cost $200-$600 and prevent $2,000-$8,000 in coil damage. After any major hail event, get your rooftop units inspected.

Have a relationship with a contractor before you need one. When you call a contractor for the first time during an emergency, you are a stranger competing with their existing customers for attention. Maintenance contract customers always get priority.

When to Plan Replacement Instead of Emergency Repair

Sometimes an emergency breakdown is your system telling you it is done. Here is when to stop putting money into repairs and plan for replacement.

The 50% rule: If the repair costs more than 50% of what a new unit would cost, replace it. A $3,000 repair on a unit that costs $12,000 to replace is borderline. A $4,000 repair on a $10,000 unit is a definite replacement.

The age factor: If your unit is over 15 years old, every emergency repair is buying months, not years. Plan the replacement on your timeline instead of the unit’s timeline.

The frequency test: Three or more breakdowns in the past 12 months means the unit is in decline. Each repair fixes one thing while something else is wearing out.

The refrigerant question: If your unit uses R-22 (Freon), it is already old and the refrigerant is extremely expensive ($80-$150/pound). Every recharge costs more than the last. R-22 units should be on a replacement plan now.

The energy math: A failing 15-year-old RTU might be running at 60-70% of its original efficiency. That means you are paying 30-40% more in electricity every month. A new unit with a 10-year warranty and 30% better efficiency often pays for itself in energy savings.

Call for Commercial HVAC Emergency Service

If your building is down right now, call (940) 390-5676. I service commercial HVAC emergencies across Frisco, Plano, McKinney, Allen, Addison, Prosper, Little Elm, and The Colony. 2-hour response time. We show up with a fully stocked truck and fix most problems in a single visit.

If you want to make sure the next emergency never happens, contact us about a commercial maintenance plan.

Frequently Asked Questions

How much does emergency commercial HVAC repair cost?

Emergency commercial HVAC repair in North Texas costs $500-$5,000+ depending on the problem. Common repairs: capacitor replacement $250-$500, contactor $300-$600, refrigerant recharge $400-$1,200, compressor replacement $2,500-$5,000+. After-hours service adds $150-$350 in surcharges. Diagnostic fees run $150-$300 and are typically applied toward the repair cost.

How fast can a commercial HVAC technician respond?

Jupitair HVAC offers 2-hour emergency response across North Texas including Frisco, Plano, McKinney, Allen, and Addison. During peak summer (June-August), response times industry-wide can stretch to 4-8 hours because every contractor is handling emergencies. Maintenance contract customers always get priority scheduling, which is the biggest practical benefit of having a contract.

Can I use portable AC units to cool my business temporarily?

Yes. Portable spot coolers (1-5 ton) rent for $200-$800/day in the DFW area and can cool critical areas like server rooms, kitchens, or customer-facing spaces. They need a standard 120V or 208V outlet and a way to exhaust hot air outside. Several rental companies in DFW offer same-day delivery for emergency situations. For larger buildings needing extended temporary cooling, trailer-mounted chillers ($1,000-$3,000/day) can connect to your building’s duct system.

When should I replace my commercial HVAC instead of repairing it?

Replace instead of repair when: the unit is over 15 years old, the repair costs more than 50% of replacement cost, you have had 3+ breakdowns in the past year, or the unit uses R-22 refrigerant (phased out, extremely expensive to recharge). A planned replacement saves 20-40% compared to an emergency swap because you can schedule crane time, get competitive bids, and avoid rush-order equipment pricing.