Whether you have a single window air conditioner in the garage or a few of them throughout the house, at some point in time at least one of them is going to need repairs. Before you contact the air conditioner technician, do a bit of troubleshooting. It might be a problem you can fix yourself. Here are a few things to look for and what you can do about them.
Unit Icing Up
If you notice that the vents on the air conditioner are covered with ice it could be due to a few different reasons. This usually happens because the unit is running constantly, never cycling off. Regardless, you need to turn the unit off and wait for the ice to melt. The first thing to check is the filter. A dirty filter will inhibit air flow and the unit will run continually trying to get enough air. If the filter has been cleaned and the unit still won't shut off, try changing the temperature setting to something higher. If it now cycles, but the room does not get cool enough for your comfort, the unit is too small for the room. If, however, the unit still keeps running and causing the vent to ice, there is probably something wrong with one of the controls in the unit, perhaps the thermostat. This is something you should have a professional check.
Water Leaking in the House
If you notice that water is dripping off the unit and into the house, it probably isn't a problem with the unit. As the unit runs, water condensates on the coils. Most units have a drain on the back of them that allows for the water to drip outside. When the water is dripping inside, it is often due to a clogged drain. Go around to the back side of the unit and look for the drain. You can then attempt to clear the clog. This can be done by forcing water through it with a hose. You should also clean out the base of the unit to keep debris from flowing into the drain again.
If your window air conditioning unit is not working and you cannot find the problem and fix it yourself, you can contact an HVAC technician, like one at TLC Indoor Air Services & Home Improvement, LLC, or just replace it. Call the repair company, explain what is happening, and ask if it is worth it to repair the unit or not. They may have a reconditioned one you can buy for a better price than paying for the repair.