(615) 423-7070

Heating

Commercial and Residential furnace installation, service, and maintenance


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Air Conditioning

Commercial and Residential AC installation, service, and maintenance


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Service & Maintenance

Annual tune-ups and maintenance for your HVAC system.


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Refrigeration

Commercial refrigeration repair, maintenance, and installation.


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Having Heating or Cooling Trouble?

Try our Sub-Zero HVACR troubleshooter!

What type of problem are you having?
What type of Air Conditioner Problem are you having?

This can be Caused by your Thermostat:

Solution:

  • Make sure your thermostat is turned on
  • Set 3 degrees above room temperature
  • Turn on cool, not fan or heat

If the thermostat screen is blank, then the battery is dead. Replace the battery.

Did that solve your problem?

Your Air Filter May be Dirty.

Check yours and change if visibly dirty

Did that solve your problem?
Is your outdoor unit running?

Your AC's circuit breaker may have been tripped:

Here's what to do:

  • Find your breaker box and look for the circuit labeled "air conditioner"
  • Try flipping that circuit to "off" and then "on"
  • Give your air conditioner a couple minutes and see if it comes on now
Did that solve your problem?
Is there air coming out of your vents?
Is there Ice on your Outdoor Unit?
Is there air coming out of your vents?
Is there Ice on your Outdoor Unit?

Awesome!!

Glad we were able to help you solve your problem. We'll be here if you need us again.

Sounds like you need expert care.

Please turn off your system and call us right away!

What type of heating problem are you having?
What type of heater do you have?

This can be Caused by your Thermostat:

Solution:

  • Make sure your thermostat is turned on
  • Set 3 degrees below room temperature
  • Turn on heat, not fan or cool

If the thermostat screen is blank, then the battery is dead. Replace the battery.

Did that solve your problem?

This can be caused by your Thermostat:

Solution:

  • Make sure your thermostat is turned on
  • Set 3 degrees below room temperature
  • Turn on heat, not fan or cool

If the thermostat screen is blank, then the battery is dead. Replace the battery.

Did that solve your problem?
What best describes your heating problem?

Make sure power is getting to the furnace

Try this:

  • Check your home's electrical panel. Flip the furnace's circuit to "off" and then "on" again.
  • Look for a switch (like a light switch) near your furnace and make sure it is set to "on".
Did that solve your problem?
Is your outdoor unit running?
Is there ice on your outdoor unit?

Your heat pump's circuit breaker may have been tripped.

Here's what to do:

  • Find your breaker box and look for the circuit labeled "heat pump" or "air conditioner".
  • Try flipping that circuit to "off" and then"on".
  • Give your heat pump a couple minutes and see if it comes on now.

Note: If your heat pump is regularly tripping your circuit breaker, contact us immediately as there is a larger problem.

Did that solve your problem?
Is there ice on your outdoor unit?
Is the noise coming from the outside or inside unit?
What type of heater do you have?

Is there steam coming from the unit, as well?

Here's what to do:

This is your heat pump's normal defrost mode.

What type of smell?
Did you just turn your heater on for the first time this winter?

This is likely normal.

The smell should go away in a few minutes.

Contact us if the smell persists.

Turn off your furnace now!

There could be a dangerous gas leak in your home. Turn off your furnace immediately and contact a heating repair person.

You need your regular maintenance

This is usually caused by a dirty coil and/or lack of regular maintenance on your heater.

We're your local heating and cooling experts.

Welcome to Sub-Zero HVACR, your ultimate destination for top-tier heating, air conditioning, HVAC maintenance, and refrigeration services. At Sub-Zero HVACR, we pride ourselves on being more than just a service provider—we're your partners in maintaining optimal comfort and efficiency in your spaces. Our core values of integrity, trustworthiness, punctuality, reliability, and transparency define who we are and how we operate.

We service areas all over Middle TN from Westmoreland to Nashville, Murfreesboro, Gallatin, Portland, Castalian Springs, Lafayette, Lebanon, Hendersonville, Bethpage, and many more.

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HVAC Service Near You

We offer the following services: Learn More

Featured Services

Give us a call at (615) 423-7070 to schedule your service!

Preventative Maintenance

2 visits, 6 months apart.

$99

Estimates

System replacement estimate

FREE ESTIMATES!

Service Call Diagnosis

Service call to diagnose your system.

$99

Hourly Rates

$102 Per Hour Service

Nashville HVAC Sevices

The Best Comfort Products for Your Home

If your current system is getting old, you may notice that your energy bills are going up and repairs are becoming more frequent and costly. Replacing your old unit can save you money and can help you and your family feel more comfortable in your home.

Replacing your home heating and cooling system is a significant investment. Let Sub-Zero HVACR help you determine the right time to replace it. Your new system should fit both your needs and budget.



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Top-Rated HVAC Service!

Check out what our customers have to say!