3 Fast Steps for Fixing a Frozen Air Conditioner

Does the air emitting from your supply registers suddenly seem warm? Check the indoor portion of your air conditioner. This piece is situated in your furnace or air handler, if you rely on a heat pump. If there’s water leaking onto the floor, there might be crystals on the evaporator coil. The AC coil inside the equipment might have frozen. You’ll need to melt it before it can cool your house again.

Here’s what to do. If you can’t get the coil frost-free, Bob Brown Service Experts is here to help with air conditioning repair in Tempe backed by a 100% satisfaction guarantee.*

Step 1: Set the Air Conditioning to Off and the Blower On

To get started—move the thermostat from “cool” to “off.” This halts chilly refrigerant from flowing to the outdoor compressor, which could damage it and result in an expensive repair.

After that, switch the fan from “auto” to “on.” This produces hot airflow over the frozen coils to force them to defrost faster. Remember to set the cooling mode to “off” so the air conditioner doesn’t start a cooling cycle.

It might take less than an hour or the majority of the day for the ice to defrost, depending on the level of the ice. While you’re waiting, watch the condensate pan under the AC unit. If the drain line is blocked, it could cause a mess as the ice melts, likely causing water damage.

Step 2: Troubleshoot the Issue

Insufficient airflow is a prime cause for an AC to freeze up. Here’s how to troubleshoot the situation:

  • Exmaine the filter. Inadequate airflow through a clogged filter could be the culprit. Inspect and replace the filter once a month or once you notice a layer of dust.
  • Open any shut supply vents. Your residence’s supply registers should remain open always. Closing vents limits airflow over the evaporator coil, which can result in it freezing.
  • Check for obstructed return vents. These typically don’t come with shiftable louvers, but furniture, rugs or curtains can still block them.
  • Insufficient refrigerant: While airflow restrictions are the most frequent suspect, your air conditioner may also have insufficient refrigerant. Depending on its age, it may rely on Freon®. Low refrigerant necessitates pro support from a certified HVAC technician. H2: Step 3: Call an HVAC Technician at Bob Brown Service Experts

If poor airflow doesn’t feel like the trouble, then another issue is causing your AC frost over. If this is what’s going on, simply letting it melt won’t fix the issue. The evaporator coil will possibly freeze again unless you fix the main cause. Get in touch with an HVAC professional to look for issues with your air conditioner, which might include:

  • Refrigerant leak: AC units recycle refrigerant, so it shouldn’t get used up. Insufficient refrigerant signals a leak somewhere. Only a pro can locate the leak, fix it, and recharge the air conditioner to the correct concentration.
  • Grimy evaporator coil: If grime collects on the coil, air can’t flow over it, and it’s apt to freeze.
  • Broken blower: A faulty motor or unbalanced fan may halt airflow over the evaporator coil.

If your AC freezes up, get in touch with the ACE-certified techs at Bob Brown Service Experts to take care of the problem. We have years of experience helping homeowners troubleshoot their air conditioners, and we’re confident we can get things working again fast. Contact us at 623-243-4517 to book air conditioning repair in Tempe with us now.


*Not applicable to the Advantage Program. See your signed Advantage Program agreement for full details and exclusions. 100% Satisfaction Guarantee is subject to certain restrictions and limitations as set forth in the applicable Terms and Conditions.

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