Unlock the Right Part
for Your Repair
Find the exact part you need
Enter your model number to see parts that fit your machine.
Price Match Guarantee
In-stock parts ship the same day
365-Day Return Policy
Price Match GuaranteeChoose Product
Identify Problem
03
Find Solutions
HomeRepair HelpMars Central A/C RepairMars Central air conditioner is frequently cycling/short cycling Repair
Mars Central air conditioner is frequently cycling/short cycling
When your Mars central air conditioner is short cycling, it turns on and off repeatedly instead of completing a normal cooling cycle. The most likely cause is a dirty or clogged air filter, which restricts airflow through the furnace or air handler, can freeze the evaporator coil, and makes the system cycle too often. Next, inspect the condenser coil for dirt and debris. A dirty condenser coil cannot release heat efficiently, which can overheat the compressor and cause central air short cycling. A faulty wall thermostat or thermostat wiring is less common but may have defective electrical contacts that intermittently control the furnace, air handler, or condensing unit. A failed control board can also interrupt power to cooling components and cause an air conditioner to turn on and off repeatedly. Replace the air filter and clean the condenser coil only with power disconnected at the disconnect box. Testing or replacing a thermostat or control board involves electrical wiring, so shut off power and use proper safety procedures; leave 240V testing and refrigerant or sealed-system repairs to a licensed HVAC technician. Enter your Mars model number to find the exact replacement air filter, thermostat, or control board for your central air conditioner.
01 - Mars Central Air Conditioner Air Filter
Check and replace the air filter at least twice a year, more often in dusty/dirty environments or if there is a pet in the home. A clogged air filter will greatly reduce the air flow of the furnace or air handler which can result in the unit short cycling when trying to cool the home.
Enter model number to search for the required part specific to your product
Highly Likely
02 - Condenser Coils are Dirty
The condenser coils dissipate the heat as the refrigerant passes through the coils. If the condenser coils are dirty, they won’t be able to dissipate the heat as effectively. As debris builds up on the coils, the heat pump will become less efficient, causing the unit to work harder to cool down. If the coils are significantly dirty, the heat pump will not be able to remove the heat from the outdoor coil, resulting in the compressor overheating and short cycling. Check the condenser coils to determine if they are dirty. Refer to owner's manual for cleaning instructions.
Common
03 - Mars Central Air Conditioner Wall Thermostat
The wall thermostat has electrical contacts that control the power supply to the furnace, air handler and condensing unit. If the contacts in the thermostat fail, the cooling system may turn on intermittently. To determine if the thermostat is defective, use a multimeter to test it for continuity. If the wall thermostat does not show proper continuity, replace it.
Less Common
04 - Mars Central Air Conditioner Wifi Thermostat
The WiFi thermostat has electrical contacts that control the power supply to the furnace, air handler and condensing unit. If the contacts in the thermostat fail, the cooling system may run intermittently. To determine if the thermostat is defective, use a multimeter to test it for continuity. If the WiFi thermostat does not show proper continuity, replace it.
Less Common
05 - Clogged Air Filter
If the air filter is clogged, air cannot flow properly through the home's venting system. This greatly reduces the cooling capacity of the air conditioner. In addition, if the air filter is clogged, the evaporator coils will frost over and not be able to remove moisture from the air. The air filter should be checked and replaced at least twice a year, more often in dusty/dirty environments. Refer to owner's manual for guidance.
Less Common
06 - Mars Central Air Conditioner Control Board
The control board regulates the power supply to all of the components of the furnace or air handler. If the control board fails, it might not send voltage to parts of the cooling system, causing a loss of cooling and frequent cycling.
Less Common
Frequently Asked Questions
Why is my Mars central air conditioner short cycling?
Can a clogged air filter make my AC turn on and off repeatedly?
Can dirty condenser coils cause a central air conditioner to short cycle?
How do I test the thermostat if my AC is short cycling?
How do I find the correct Mars central air conditioner replacement part?
Shop by Mars Central Air Conditioner Parts
Our Story
Family-owned and operated since 1912, Burke America Parts Group is the longest-running genuine appliance, HVAC, and outdoor power equipment parts solution in North America. At Repair Clinic, we're proud to be an international brand trusted by the pros as well as the DIY community.
About Repair Clinic
© 2026 RepairClinic.com