24/7 Emergency HVAC Repair in Louisville & Lexington, Kentucky

Dauenhauer Plumbing, Heating, Air & Electric offers 24/7 emergency HVAC repair throughout Louisville, Lexington, and Central Kentucky. Our NATE-certified technicians handle everything from no-heat, no-AC, refrigerant leaks, gas furnace failures, and CO-related shutdowns for residential customers.  

Our automated messaging system helps us manage calls on nights and weekends. Our on-call technician will be dispatched to your home at our earliest availability. Our fast response times allow us to make swift repairs to HVAC systems to restore your comfort and safety. Call (502) 275-0400. 

What Counts as an HVAC Emergency? 

An HVAC emergency is any heating or cooling failure that creates a safety, health, or property-damage risk within hours. This includes no heat with outdoor temperatures below 35°F (frozen pipe risk), no air conditioning above 80°F indoors when infants or elderly residents are present, the smell of natural gas, an active CO alarm, or burning/electrical odors from the unit. Leave the home if you smell gas or hear a CO alarm go off, then call your utility, 911, and a licensed HVAC contractor in that order.  

If you’re unsure if you have an emergency on your hands, call—we won’t bill an emergency fee for a non-emergency we can’t fix that day.  

Below is a symptom decision table to help you determine if you have an HVAC emergency. 

“Is This an HVAC Emergency?”  

Symptom	Action
Smell of natural gas (rotten eggs)	Leave the home, then call LG&E or KU and 911. Do NOT call us first.
CO alarm sounding	Leave the home and call 911. Then call Dauenhauer for HVAC inspection.
No heat with outdoor temp below 35°F	Call now—risk of frozen pipes within hours.
No AC with indoor temp above 80°F (infants, elderly, medical needs)	Call now—heat-related health risk.
Burning, electrical, or chemical smell	Switch off system at the emergency shutoff, then call us.
Water leaking from indoor unit/ceiling stain	Switch off system, place towel/bucket, call us.
Loud grinding or banging from outdoor unit	Shut down at thermostat to prevent further damage; call us.
Mild temperature swing, dirty filter, no comfort threat	Schedule next-day service. Save the emergency fee.

Safety First — Gas Smell, CO Alarm, Electrical 

It’s important that you protect yourself and your family from potential danger at home. In the case of a gas smell, CO alarm, or electrical or burning smell, it’s critical you know what steps to take.  

Here’s a breakdown: 

• If you smell gas, vacate your home and call LG&E (502-589-1444) or Kentucky Utilities + 911. 
• If your CO alarm goes off, leave your home, call 911 and then call Dauenhauer.  
• If you smell an electrical or burning scent, switch off your power at the main breaker using the emergency shutoff and call Dauenhauer.  

Always prioritize the safety of yourself and those around you. Once you and your family are safe, call us—we’ll send a technician as soon as possible. 

24/7 Emergency Repairs We Handle 

Dauenhauer handles a wide variety of emergency HVAC repairs in Louisville and Lexington, KY. From thermostat issues to no-AC or no-heat problems, we can help. 

• Central AC not cooling, frozen coil, refrigerant leak, capacitor failure 
• Furnace not igniting, pilot/ignitor failure, flame sensor, blower motor 
• Heat pump not heating in winter/stuck in defrost 
• Ductless mini-split error codes, leaking units, no power 
• Boiler no-heat, low pressure, leaking circulator pump 

Smart thermostat blank screen/Wi-Fi disconnect 

How Much Does Emergency HVAC Repair Cost? 

Most emergency HVAC repairs in Louisville and Lexington depends on the severity of the issue and the system type. Additionally, there is generally an after-hours fee for emergency repairs.  

For instance, if your AC goes out at 11 PM on a Friday or your heat stops working on a holiday weekend, an HVAC technician will need to leave their home outside of normal business hours to handle the repair. An after-hours fee reflects the cost of booking a certified technician outside of normal business hours.  

You can think of it as an urgent care visit instead of a scheduled appointment. However, most HVAC companies, including Dauenhauer, credit the after-hours fee toward the total cost of your repair. For larger repairs, such as issues with the compressor or heat exchanger, we offer flexible financing options.  

Try These 5 Steps Before We Arrive 

Sometimes, HVAC issues can be simple and fixed easily. Try these remediation steps while you wait for our technician to arrive: 

1. Examine Thermostat Settings 

The incorrect date or heating preferences can completely dismantle a system. It’s a good idea to check your thermostat settings to see if they are the cause of the HVAC failure.  

2. Check Thermostat Batteries 

Replacing your thermostat batteries can also sometimes help you regain control of your heating or cooling. Sometimes it is the thermostat’s power source keeping it from functioning properly.  

3. Check Power Sources 

Check your circuit breaker and emergency power switch. If there’s an issue with either, your thermostat won’t get the signals it needs to adjust the temperature. 

4. Inspect Air Filters 

You should also inspect your air filters for dust and debris. When air filters are dirty, it makes it hard for air to flow properly from your HVAC system. Replace dirty filters with clean ones when needed. 

5. Switch the System Off 

If you smell or hear something unusual, switch your HVAC system off. Running it longer can turn a $400 repair into a $4,000 one.  

Why Choose Dauenhauer for Emergency HVAC Repair? 

Here’s why homeowners in Louisville, Lexington, and Central Kentucky call us for emergency HVAC repairs. 

Trusted Local Service Provider 

Dauenhauer has been serving Central Kentucky since 1958. Our NATE-certified technicians are licensed and insured for peace of mind. They are also EPA Section 608-certified for refrigerant handling and travel in fully stocked service trucks.  

Experts in Top Brands 

Our local HVAC technicians service HVAC systems of all kinds, from top brands including Carrier, Trane, Lennox, Goodman, Rheem, Bryant, York, American Standard, Mitsubishi, and Daikin.  

We’re Different 

We provide a written warranty on all emergency repairs and disclose upfront pricing before work begins. We also offer flexible financing and a 100% satisfaction guarantee.  

Schedule Emergency HVAC Repair  

Dauenhauer is proud to offer 24/7 emergency availability to homeowners in Louisville, Lexington, and the surrounding areas. Call us anytime for emergency HVAC repairs! 

Call (502) 275-0400 or Schedule Online 

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