Emergency HVAC Repair in Detroit Metro

Big Mike’s takes same-day emergency calls Monday through Saturday, 9 AM to 5 PM ET. We don’t run a 24/7 emergency line — we believe rest matters and we’d rather have well-rested techs do the job right.

During business hours we prioritize true emergencies and most Wayne County calls are on-site within 2–4 hours of calling.

After hours, leave a voicemail and we’ll prioritize you first thing the next business day. For true overnight emergencies (gas leaks, CO alarms), see the questions below.

No. Big Mike’s charges the same flat $79 service call for emergencies as we do for routine calls:

• No emergency surcharges
• No weekend markups
• No holiday inflation
• No “after-hours” multiplier on repair labor

That $79 covers full diagnosis with written estimate, and gets credited toward your repair if you approve the work same visit.

Many HVAC companies use “emergency” as an excuse to charge 2-3× rates. We don’t. Same price every day, every time.

Furnace failure overnight in Detroit winter — practical steps:

1. Stay calm — homes hold heat for several hours, especially well-insulated ones.
2. Layer up — sweaters, blankets, hats. Body heat under blankets is your friend.
3. Use space heaters safely — never within 3 feet of bedding or curtains. Never run an oven for heat (CO poisoning risk).
4. Watch your pipes — if temps drop below 20°F, open cabinet doors under sinks and let faucets drip slightly to prevent freezing.
5. Call us at 9 AM — overnight callers get priority on the next-day schedule.

For true emergencies (no clear backup heat, vulnerable family members, sub-zero temps), call your utility for emergency assistance programs or a nearby warming center.

AC failure during Detroit summer heat:

1. Close blinds and curtains on sun-facing windows.
2. Keep interior doors open to allow air circulation.
3. Run ceiling fans and box fans.
4. Stay hydrated and avoid the upper floors during peak afternoon heat.
5. For elderly family members or young children, plan to spend a few hours at a cool location (mall, library, neighbor) during the hottest hours.
6. Call us at 9 AM — we prioritize no-AC calls during heat waves.

The Wayne County Health Department also operates cooling centers during extreme heat events — call 311 for locations.

This is a true emergency that requires immediate action — not HVAC service.

1. Get everyone out of the house immediately — do not stay inside.
2. Do not turn on any electrical switches, lights, or appliances — sparks can ignite gas.
3. Once outside, call your gas company emergency line:
   • DTE Energy: 800-477-4747
   • Consumers Energy: 800-477-5050
   They respond 24/7.
4. Call 911 if you have any breathing difficulty, dizziness, or feel unwell.
5. Once the gas company has cleared the leak and made the house safe, call us at (313) 398-0504 to fix the underlying HVAC issue that caused it.

We’re registered for CO testing and gas appliance inspection.

Same-day for most emergencies. Typical response times during business hours:

• Wayne County (Detroit, Dearborn, Dearborn Heights, Livonia, Westland): 2-4 hours
• Macomb County: 3-5 hours
• Oakland County: 3-5 hours

Commercial accounts with maintenance contracts get expedited dispatch. Call (313) 398-0504 to confirm same-day availability — we’ll be straight with you about ETA. If we can’t get there same-day, we’ll tell you so you can call someone else who can.

Every common HVAC emergency, residential and commercial:

• No heat — furnace failures, gas valve issues, ignition problems
• No AC — compressor failures, refrigerant emergencies, capacitor failures
• Water heater emergencies — leaks, no hot water, gas issues
• Boiler failures — heating boiler service for older Detroit homes
• Frozen evaporator coils — needs proper diagnosis to fix root cause
• CO detector activations — after gas company clears, we find and fix the source
• Commercial HVAC failures — RTUs, restaurant AC, retail spaces
• Walk-in cooler failures — inventory protection priority
• Ductless mini-split emergencies

Both residential and commercial across Wayne, Macomb, and Oakland County.

Most HVAC issues can safely wait overnight:

• AC that quit
• Furnace that’s intermittent
• No hot water
• Water heater dripping slowly

Things that should NOT wait:

• Gas smell — call gas company immediately
• CO detector activating — evacuate + call 911
• Uncontrolled water leak from water heater — turn off water supply first
• Vulnerable people in the home during extreme weather (elderly, infants, medical conditions)

For non-emergency same-day failures, use safe space heaters in winter or stay cool elsewhere in summer, and call us at 9 AM. We prioritize overnight emergencies on the next-day schedule.

Yes — commercial emergencies are a major service line, especially for our retail and restaurant accounts. Trusted by 7-Eleven, Speedway, Family Dollar, and independent operators.

Commercial maintenance contract holders get priority dispatch and expedited response. Common commercial emergencies:

• RTU failures during business hours
• Refrigeration failures (inventory protection priority)
• Restaurant AC during meal service
• Heating failures in offices

Call us with your business name and location and we’ll dispatch immediately if available. See our Commercial HVAC page for full service details.

Refrigeration emergencies get priority because inventory spoilage starts in hours, not days.

We respond same-day during business hours for:

• Walk-in cooler failures
• Walk-in freezer issues
• Ice machine failures
• Reach-in cooler problems

When the cooler is down during peak hours, we focus on fastest path to temperature recovery and help you protect inventory during the repair. EPA 608 certified for all refrigerant work. See our Commercial Refrigeration page for full details.

Frozen pipes from no-heat situations are common during Detroit cold snaps. If you suspect frozen pipes:

1. Shut off the main water supply to your house to prevent flooding if a pipe bursts.
2. Open faucets so any pressure can release.
3. Never use open flames (torches, candles) to thaw pipes — fire risk.
4. A hair dryer on low or heat tape are safer thaw options.
5. Call a plumber for the frozen pipe issue itself.
6. Call us at (313) 398-0504 to fix the underlying furnace problem so it doesn’t happen again.

Prevention is cheaper than repair — if your furnace has been struggling, get it serviced before the next cold snap.

Yes — fully credentialed:

• Michigan Mechanical Licensed (required for HVAC work)
• EPA 608 Certified (required for refrigerant handling)
• BBB Accredited Business
• Fully insured with general liability and workers comp
• Registered with all Wayne County cities
• Registered for CO testing

License numbers available on request. Many fake emergency services pop up during weather extremes — fly-by-night operators charging triple rates with no insurance. Always verify credentials before letting anyone work on your gas or refrigerant systems.