My Central Heat isn’t Working, but the AC is… What Gives?

January 29, 2023 Howard Air & Plumbing

Updated: January 29, 2023

Most homeowners in Arizona appreciate the importance of having their HVAC systems working perfectly. Sadly, at some point, you may realize that your AC is working, but the central heat is not. You need to know that this problem is not unique to you. An experienced HVAC contractor can fix this problem but before contacting one of these repair guys, let us first look at the common causes of this issue, shall we?

4 Reasons Why Your Central Heat is Not Working

A Faulty Thermostat

You need to start by checking if your thermostat is powered and working properly. Try turning on the thermostat and adjusting the temperature so that your HVAC is turned on. If it fails to come on, check the circuit breaker and ensure that the switch is functioning properly. If you find that it had tripped, turn it back on. This should fix the problem.

Clogged Filters

The HVAC has coil air returns which help in filtering the air coming into your home. You need to clean these filters at least twice a year. However, depending on the usage of the system, you may need to clean the filters more than twice in a year.

Pilot Light or Igniter Problems

If your central heating unit uses gas or propane, then it is essential to check if the pilot light or igniter is operational. If you discover that the heat does not come on even after you have reset the thermostat, you should then shut off the gas and verify if you have gas, then reset the igniter. If you have gas and the igniter still fails to light after the reset, you should consider replacing the igniter or calling an HVAC repair technician to help check your central heating unit.

Poorly Maintained Furnace

It is common to find that the central heating stops working abruptly. This is often caused by the furnace detecting some problems which can easily be corrected through regular maintenance by an HVAC repair technician. Routine furnace maintenance is necessary because it will ensure that:

Motors spin with no resistance
The furnace does not experience too much stress
The central air system stays in perfect condition and gives you service for longer.

Speak to the Professionals

At Phoenix-based Howard Air & Plumbing, we are committed to ensuring that our clients’ central heating works perfectly. Our experienced team of HVAC repair technicians has the expertise needed to handle a wide range of central heating-related problems. Contact Howard Air & Plumbing today and schedule a repair or routine maintenance.

Featured image: stefanolunardi on Shutterstock

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   Andree Stahl 
 January 15, 2026
 
 
 Trustindex verifies that the original source of the review is Google. Alejandro Farias was knowledgeable, pleasant, professional and very helpful. He thoroughly answered my questions and checked to ensure that our system was in good working order. He also showed videos of all of the components that were checked. There were no additional costs incurred today.
  
 
      Posted on Google  
   
   M Stahl 
 January 15, 2026
 
 
 Trustindex verifies that the original source of the review is Google. Alejandro Farias was knowledgeable, pleasant, professional and very helpful. He thoroughly answered my questions and checked to ensure that our system was in good working order. He also showed videos of all of the components that were checked. There were no additional costs incurred today.
  
 
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   James S 
 January 15, 2026
 
 
 Trustindex verifies that the original source of the review is Google. Raymond Gonzalez did an outstanding job with a HVAC check. He has a great personality, does a very thorough inspection and explains the results thru pics and in writing. A+ visit!
  
 
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   kimberley viraco 
 January 15, 2026
 
 
 Trustindex verifies that the original source of the review is Google. Howard Air reminded me I needed to do my tune up.  They booked my appointment, sent me reminders and let me know when my tech was on his way.  Hayden listened to my concerns, dis the tune up and provided sound advice.  He even coordinated getting an appointment set up to have the attic insulation reviewed.  Highly recommend using Howard Air!
  
 
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   Shalimar Marshall 
 January 14, 2026
 
 
 Trustindex verifies that the original source of the review is Google. Erik was able to fix our issue fast and efficiently! He was professional and friendly!
  
 
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   TJ Leitzke 
 January 14, 2026
 
 
 Trustindex verifies that the original source of the review is Google. Much was a great technician
  
 
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   Cynthia Keith 
 January 14, 2026
 
 
 Trustindex verifies that the original source of the review is Google. Howard Air technician, Collin Froreich arrived promptly to check our outdoor A/C unit. He was very polite and knowledgeable. Thank you, Collin for servicing our unit today.