6 Common problems with a window AC

window ac problems

To start off, we find it imperative to mention that if you maintain a good AC servicing schedule you’d be spending lesser on electricity and keeping your room cool without any problems. Make sure you get your window AC serviced once at the beginning of summers and once after the summers end. On that note, let’s have a look at the most common problems with window ACs.

1. Water dripping from the front of a window AC

water leakage from ac

Well, the problem lies with the angle on with the AC is mounted. A window AC should be mounted with a slight slope towards the rear end. This makes the condensed water to flow outside through the drain pipe. Water can drip from the front if the slope is towards inside. Thus, a reinstallation is needed to rectify this problem.

2. Compressor cycles between ON and OFF too frequently

ac compressor problem

This indicates there’s a problem with the thermostat or the temperature sensor. Start by making sure the temperature sensor is positioned near to the evaporator coils. Then, make sure the AC filter is not clogged. If the problem still persists, the thermostat is at fault. Consult an AC repair professional to rectify the problem.

3. Ice formation on window AC


When the level of refrigerant is less than the required amount, the temperature of cooling coil drops much below the normal. Due to this phenomena, the moisture in the room condenses on the coil and freezes. To rectify this issue of ice formation on AC, call an AC repair professional as he will be able to accurately determine if the refrigerant level is right in your AC. For more on ice formation inside AC follow this link: Why has ice formed on my air conditioner?

READ ALSO:  How to install a split air conditioner?

4. Window AC not starting problem

Well in this case, most likely the PCB of the AC unit is at fault. There’s no specific reasons to why the PCB has failed. It can be due to surges in current, too frequent ON-OFF cycles, physical damages etc. In cases where ICs or capacitors have burned, they can simply be replaced and the repair is quite cheap. If the damage is more, the whole PCB has to be changed, which can be expensive depending upon the technology used in the window AC.

5. Window AC with low cooling performance

gas leakage from ac

Lack of coolant (Freon) is a very common reason behind AC not cooling problem. The coolant circulates through the evaporator coils and cools the air flowing over it and eventually sends cool air into the room. So when the level of this coolant becomes insufficient, the AC fails to cool. In many cases, the coolant leaks from the unit and AC stops cooling. An AC repair professional will be able to accurately determine if the refrigerant level is just right in the cooling coils. A clogged AC filter also lowers the cooling performance. Make sure to clean the filters once every month.

6. Compressor switching off too early without cooling

outer part of window ac

This problem arises due to increase in temperatures above normal and thus to protect the compressor, the temperature sensor cuts off power supply to it. There can be 2 reasons for the high temperature. One is an unstable power supply to the AC. Second is there’s no space outside for proper air flow. There should be at least 3-5 feet of distance between the AC and any obstruction.

READ ALSO:  6 most common AC installation mistakes to be informed about

For any other queries regarding problems with window AC, please feel free to comment in the section below.


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    I have window ac PEL, MODEL. PAC 19KR 18000BTU….The problem is. Its compressor yrip after 6 minutes what is the problem

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    Great information.My friend had encountered the same problem about an year before.So I was very careful while selecting AC and I have bought from electric furnace outlet which is one of the best ac deals online.

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