You should build air conditioning platforms for your air conditioners. It is common to find AC units resting on a ground-level platform and this is not advisable. You need to consider having your AC moved to a wall mount bracket that is elevated. The brackets aren’t hard to install. A qualified professional can move the unit from one location to another. But if you do not get the AC unit off the ground then you may incur some issues that will result in expensive repairs. Here are some disadvantages of leaving your unit on ground-level pads.
Harder to keep your AC unit level
Resting your unit on a pad has a lot of disadvantages and one of them is that it is difficult to keep it level. Leaving your unit on uneven surfaces can be problematic since wiring between the AC and the connected components are stressed through shifting alignments. The compressor inside an outdoor unit also contains moving parts that operate best when level. With time, uneven wear will be introduced within the compressor and can lead to premature failure of your system.
Installers often use inadequate pads to maintain a level surface for a long time. however, even heavier pads are prone to shifting with time. As soils under the pad settle and get eroded, the pad begins to lean towards one direction.
Vulnerable to animal damage
It may seem humorous to think of animals using your unit as a convenient relieving place but the damage caused by urine is not a laughing matter. Urine has high levels of ammonia that can corrode the outer cabinet of your unit and the condenser coils. Urine odour can also be embarrassing and can attract other unwelcome animals to your home. Avoid this by installing elevated AC unit platforms.
Pets are not the only source of trouble for your ground-level outdoor units. It is also common for wild animals to seek to shelter in these locations during winter. You also do not want rodents building nesting places in the cabinet and chewing on wiring or causing another mischief. Damage caused by animals can be very expensive to fix and may cause a fire if left unfixed.
Makes it hard to maintain your lawn
AC units placed on ground level can make the maintenance of your lawn difficult. Doing tasks such as edging and mowing can be challenging. These installations require homeowners to use shrub trimmers to reach the hard areas between the AC and other obstructions or behind the pad.
Tempting to thieves
Without proper air conditioning platforms, your unit can be stolen by thieves. An air conditioning unit resting on a ground-based pad is vulnerable to theft due to the ease at which someone can pick it up and carry it away. On the other hand, when you install an AC on a wall-mounted unit, it will be more secure and will require more effort to steal. Since wall mounted AC units are elevated, they are visible to people who may be watching. 
