My Air Conditioner is Not Cooling

Common Problems for Tractor A/C Systems

Cool But Not Cold

If the air conditioning is set to max cool and fans on high, but is only blowing moderately cool air:

• Check to see that the cooling fans on the condenser or radiator are running when the air conditioning is on.
• Look for any restrictions like leaves, bugs or dirt that would keep air from passing over the condenser.
• Check the cabin air filter to ensure that it is not clogged.
• Check the pressures in the system using a manifold gauge set. The recommended high-side and low-side pressures can be found in the repair manual.

Compressor

When diagnosing an air conditioning issue, it's easiest to begin at the compressor.

• With the engine running turn the A/C on max cool, set fans high, and make sure that the clutch is engaging on the compressor.If the clutch is not engaging, use a voltmeter to check for voltage getting to the compressor.If there is voltage - the clutch may be bad.If there is no voltage - a cycling switch may be bad, a fuse may be blown and the system may not have enough refrigerant pressure to trip the low pressure cutoff switch that cycles the compressor. 
  • Note: this is not the pulley, but the center piece that engages the pulley to the compressor shaft. If the clutch is engaging and disengaging rapidly, the refrigerant may be low.

Leaks

Leaks are the most common problem associated with the air conditioning system.

If pressure is low, then there may be a leak.

• Using a UV A/C leak detection kit is the easiest way to find a leak.
• Check around all fittings to verify that they are all secure.
• Check hose manifolds on the compressor.
• Check the front seal and the o-rings sealing the pressure switches on the back of some compressors.
• Check where the hoses are crimped onto the fittings.
• Check the valves.
• Check for pin holes in the condenser.
• Check where the evaporator drains condensation with UV light. Sometimes oil or dye can be seen. Note: The dye check will not work if the system is too low and the compressor is not cycling.

Bad smells and odors coming from the air conditioning

Air Conditioners are prone to a build-up of bacteria, mold, fungus and other micro organisms. These generally build up behind the dash near or on the evaporator panel causing nasty smells every time your air conditioner is turned on.

We recommend using a cleaning and anti-bacterial treatment to eradicate these micro organisms and leave your car / truck / tractor smelling fresh and clean.

Do you get a pool of water under your tractor when you use your air conditioner?

This has been a concern of many clients who have called us over the years thinking that their tractor or their a/c system has developed a leak. The puddle of water you see under your car is water dripping from your car air conditioner’s evaporator via a drain tube. This is perfectly normal and not a cause for concern.

Excessive moisture inside the cabin when the air conditioning is on?

In the event that the drain tube blocks for any reason the result is often a build-up of moisture inside the tractor. This could lead to damp carpets, smells and wiring damage if left unserviced.

Regular Air Conditioning Service

Your air conditioning system is a series of machinery, pipes and filters which needs regular servicing much like your tractor’s engine. We recommend an annual service to ensure the efficiency and cleanliness of your tractor’s air conditioning.