IF YOUR AC WON'T TURN ON - CHECK YOUR DEHUMIDISTAT

We receive calls frequently stating, "My AC isn’t coming on and I think something is broken".  Before you panic or schedule an AC repair in Bradenton, check one simple thing — your dehumidistat. In many homes across Bradenton, Sarasota, Palmetto, Parrish, and Lakewood Ranch, a dehumidistat works alongside the thermostat to manage indoor humidity levels. If the dehumidistat settings are incorrect or malfunctioning, it can prevent the air conditioning system from starting properly. Before assuming you need air conditioning maintenance, checking this small control device could save you time and money.

What Is a Dehumidistat?

A dehumidistat is similar to a thermostat, but instead of controlling temperature, it regulates humidity levels inside your home. Florida homes often have dehumidistats because the climate produces high indoor humidity, especially during summer and rainy seasons. When humidity rises above the set level, the dehumidistat signals the HVAC system to remove moisture from the air. However, if the dehumidistat is set incorrectly or fails, it may interfere with the system’s normal operation.

How a Dehumidistat Can Prevent Your AC From Turning On

Many homeowners don’t realize that improper dehumidistat settings can stop the air conditioner from running. 

Common issues include:

• The humidity setting is too low, preventing the system from starting

• The dehumidistat switch is turned off or disconnected

• Faulty wiring between the thermostat and humidity control

• The device is malfunctioning or out of calibration

When this happens, your thermostat may call for cooling, but the air conditioning system won’t respond because the humidity control is interrupting the signal. This can make it seem like your AC system is broken when the issue is actually related to the humidity control settings.

Signs Your Dehumidistat May Be Causing the Problem

If your air conditioner isn’t turning on and your thermostat seems to be working normally, a dehumidistat issue could be the cause. Watch for these signs:

• Thermostat is set to cool, but AC does not start

• Your home suddenly feels more humid than usual

• The humidity control display looks incorrect or unresponsive

• The AC previously worked but stopped after adjusting humidity settings

• The system runs intermittently or unpredictably

In many cases, adjusting or resetting the dehumidistat can restore normal operation.

Simple Troubleshooting Steps

Before calling for HVAC service in Bradenton or Sarasota, try these quick checks: 

• Locate your dehumidistat control (often near the thermostat or on the air handler).
• Make sure the humidity setting is around 45–55%.
• Check that the control is turned on and properly connected.
• Lower the thermostat a few degrees to see if the system starts.

If your air conditioner begins running normally, the issue was likely related to humidity control settings. However, if your AC still won’t turn on, the problem could involve electrical components, thermostat wiring, or other HVAC issues.

When to Call an HVAC Technician

If adjusting the dehumidistat does not solve the problem, professional AC troubleshooting may be needed. 

Possible causes include:

• Faulty thermostat wiring

• Electrical issues in the HVAC system

• Failed capacitors or relays

• Compressor or blower motor problems

• Malfunctioning humidity control equipment

Ignoring these issues can lead to larger air conditioning repairs or system failure.

AC Repair and Humidity Control in Bradenton and Sarasota.

If your AC won’t turn on or your home feels excessively humid, Air & Heat Inc. provides professional HVAC repair and humidity control services throughout Manatee County and Sarasota County. Our technicians service homes in:

• Bradenton

• Palmetto

• Parrish

• Lakewood Ranch

• Sarasota

• Ellenton

We diagnose problems with thermostats, dehumidistats, electrical components, and complete air conditioning systems. 

📞 Call Air & Heat Inc. today at 941-750-6313 for fast AC repair service.