Having a frozen-over AC condenser coil isn't the best of situations, especially if your neighborhood is currently above ninety degrees. However, as a capable homeowner, you can get to the bottom of the issue quickly. Start by turning off the unit and then switching on just the fan without the thermostat. Allow the coil a few hours to defrost, and while you're doing so, start following these steps for troubleshooting.
1. Check for debris in the unit
Debris can lessen air flow, making the unit work harder and less efficiently. This in turn can cause a reaction that leads to a freeze-over of the AC coil. If leaves have gotten into the unit or weeds have started sneaking in, this could be at least part of the problem.
2. Check for vegetation and other blockages
In addition to interior airflow blockages, you'll also need to look around the outside of the unit for things that could potentially make it harder to draw air into the unit. For example, a thick growth of vegetation surrounding the unit can make it much harder for the unit to get the airflow it needs. In addition, positioning a large, impermeable object such as a wood fence or stone wall too close to the unit (or placing the unit itself too close to a large object such as the wall of your house) can keep air movement to a minimum, hindering the unit's condensing abilities and acting as a catalyst for a coil freeze-up.
3. Check the filter
If the filters in your AC vents are extremely clogged, they can also make the unit work harder for its results. This isn't likely to be the sole cause of a frozen-over unit, but anything that makes the unit work harder than it should have to can contribute to the problem. Also, a clogged filter is really bad for your health. Change it.
4. Check for a dirty coil
A dirty condenser coil simply can't function the way it's supposed to. Simply put, the function thus hindered is the coil's ability to disperse heat after it's been pulled out of your home. Of course, if the coil is covered in ice, you'll have to wait until it's thawed before checking its status and cleaning it.
5. Have a technician check the coolant level
If none of these issues seem to be present and yet you still have a frozen coil, you could be low on coolant. This could be from a recently developed coolant leak, or maybe your unit simply hasn't had the coolant topped off recently (or the last technician to perform seasonal maintenance on the unit was incompetent). You'll need to get a reliable contractor out to check on or top off the coolant level.
These five steps will help you work through some of the most common and easy-to-fix problems that can result in an iced-up coil. Talk to a company like John Legg's Heating & Air Conditioning for more ideas.
Hi, my name is Melinda, and when I sold my home three years ago, I realized that I should have been keeping maintenance records. Because I couldn't prove that we had maintained our HVAC system, the home was actually harder to sell than it should have been. I don't want anyone else to lose money on a home sale or to experience the stress of not having the right records. Because of that, I have created this blog. It explains everything you need to know about maintaining normalcy with your HVAC system and keeping records of check-ups and repairs. Please, take a seat and enjoy reading this blog.