If your window-type air conditioning system doesn’t cool or turn on, do some troubleshooting before calling for a technician because the issue may not be that big and you might be able to perform an air conditioning repair yourself.
Most problems with window-type ACs is categorized under two symptoms: it doesn’t cool adequately, or it doesn’t turn on at all. In this troubleshooting guide, learn how you can repair your AC when an issue occurs and save yourself a few hundred dollars.
If your window-type AC doesn’t turn on:
Before you do anything else, you might want to check if the unit is plugged in first then turn it on. Also, test if the outlet works by plugging in a working light. Try resetting the breaker as well and replace the fuse as it is possible that the circuit has overloaded. If it still does not turn on then proceed with checking the following:
Remove the control panel in front of AC unit to identify the switch. Afterward, examine switch terminals for any signs of burning. If evident, replace the switch by unscrewing from the panel and connect new AC unit switch the same way.
AC power cord may eventually wear out and fail to provide electricity so when your AC does not work at all, what you need to do is remove the control panel in front of AC unit. If you own a multimeter, proceed with unscrewing cord terminals and connect a test wire to bare lead wires. Set a volt-ohm-millimeter or VOM to RX1 scale and attach to cord prongs. Lastly, check the meter; if it reads greater than zero, replace the power cord.
However, if you don’t have a multimeter, I’d still recommend completing the rest of the troubleshooting before calling a repairer.
If your window-type AC doesn’t cool:
There are a lot of reasons why AC does not cool but before we try to find out what’s causing this problem, check if the thermostat is set to cool and below room temperature. Then resume by taking on the following fixes:
AC filter may become dirty or clogged if not properly cleaned or maintained. So if the unit does not cool, remove the filter and clean it with mild detergent and water. Then rinse thoroughly and air dry totally before reinstalling. And if your AC unit’s filter is replaceable, do so accordingly.
Condenser coils and evaporator
Another reason why the AC does not cool could be a dirty evaporator and bent condenser coils. Clean the coil using any vacuum cleaner and for bent fins, gently slide fin comb into spaces between fins and adjust with care.
Because drain ports is located in the openings between evaporator and condenser coils, it’s usually prone to being clogged with dirt that causes water leakage so proper cleaning as often as needed is vital if you want your AC to run efficiently and smoothly. To prevent clogging, clean ports monthly during cooling season using a wire hanger or pocketknife blade.