AC is Producing Warm Air
One of the surefire signs of a clogged refrigerant line is if you notice the AC producing warm air when you expect cold air. The warm air is caused by a problem with the proper circulation of the refrigerant fluid, which is instrumental in cooling the air.
1) Overheating: When your HVAC system filter is clogged or dirty, this may cause your air conditioner to overheat. When the filter is blocked, your AC has to work harder to keep up. This puts more pressure on the unit and can cause it to become overheated.
To clean your car's AC, turn off the engine, and let it cool. Clean or replace the air filter, wipe vents with detergent, vacuum debris, and spray cleaner. Run AC to circulate the cleaner.
There are a number of reasons why your air conditioner might be running but not cooling. It could be an issue with the thermostat, the compressor, or the evaporator coils. Or, it could simply be clogged with dust and debris, which is preventing it from working properly.
You can generally identify a blocked air duct by a distinct drop in heating and cooling efficiency, increased energy costs, and occasionally a musty, dusty smell throughout the home. The blockage usually comes over time, by a buildup of dust and debris that just accumulates until it begins choking the system.
If you ever spot any symptoms of a clogged AC drain line, you should spring right into action and work on unclogging it. Fortunately, it should only take you a few minutes at most to do it.
To unclog an AC drain line, turn off the power to the unit. Locate the drain line and use a wet/dry vacuum to suck out the clog. Flush the line with water using a garden hose or cup of water. Check and clean the drain pan under the indoor unit.
Yes, you should turn off your AC if it's not cooling.
To clean the coils, spray the fins on the inside of the unit with an A/C coil cleaner, following the manufacturer's instructions. To remove the cleaning detergent, spray with a hose to push the cleaner through the fins to the outside of the unit. Don't use a pressure washer — the force of the water can damage the fins.
Check these issues when the unit won't kick on: Check the thermostat and adjust the settings if it isn't set to Cool and an appropriate temperature setting to call for cooling. Examine the house circuit breakers for the AC unit and reset any tripped breakers. Check the air filter and replace the filter if it's dirty.
A very useful diagnostic aid is the “Feel Test”. As the test implies it is a matter of quite simply feeling tubes and components for temperature drops, indicating possible blockage location. By this stage you would be aware of what side of the A/C system should be hot and what side should be cold.
Flush the Evaporator
Attach a piece of heater hose to one fitting of the evaporator and place the other end in an empty bucket. Use the flushing tool to blast the solution into the other fitting, allowing the contaminants to drain into the bucket. Failing to secure the hose can cause spills or incomplete flushing.
Another way to tell if your AC condenser is clogged is to listen for strange noises coming from the unit. If you hear banging, rattling, or squealing, it could be a sign that the unit is struggling to function properly due to a blockage.
The most common causes of broken air conditioning leaks or compression issues. If you are feeling cool — but not cold — air, the issue could be a clogged filter, a problem with the cooling fan, signs of radiator trouble, or it could simply mean it's time to recharge your AC.
Weak Airflow: If the air coming out of your vents is weak, it could indicate a problem with your AC system. This might be due to issues like clogged filters or a failing blower motor. Warm Air: One of the most obvious signs your AC needs a repair is when your vents are blowing warm air instead of cold.