What should I service on my Aircommand air conditioner?
The unit runs but does not produce any cool air when turned on to its cooling cycle.
The unit runs but does not produce any warm air when turned on to its heating cycle.
The unit produces cool air but will not cool the van to an acceptable level.
Why would water drip from the evaporator unit?
A. The only serviceable part is the return air filter. This should be checked and cleaned regularly.
A. The thermostat might be set too high. Even if it is set at the full blue position, the unit may not cool when the ambient temperature is below about 21-22º C, as the thermostat deems it to be cool enough.
A. The thermostat might be set too low. Even if it is set at the full red position, the unit will not heat when the ambient temperature is above about 22º C. Above this temperature the unit may not start heating as the thermostat deems it to be hot enough.
If the unit is a roof top (reverse cycle) then it may be carrying out the de-ice cycle. When the condenser coil has dropped to freezing it goes through a cycle to stop ice forming on the coil. In very cold conditions this can happen quite frequently. Note: in ambient temperatures below 1-2º C supplementary heating is advisable.
A. There can be a number of possible causes, which are listed below. However, many people underestimate the heat load on a caravan sitting in the sun. This is because some caravans (particularly older vans) are not properly insulated and have large, exposed windows, pop tops and other vents that allow a significant amount of heat and hot air to enter the van. Wherever possible it is advisable to park the van in the shade, minimize the window area exposed (especially to the west) and reduce the amount of hot air entering the van to a safe minimum.
Other reasons for inadequate cooling can be:
If you wish to check that the air conditioner is operating correctly, use a thermometer to measure the temperature of the air returning to the evaporator and the temperature of the cool air coming out of the unit. If the temperature difference is in the approximate range of 11º or 12º C then it is unlikely that the unit is faulty.
A. The most likely cause is a faulty drain. It may be blocked, kinked, not installed in a continuous, downward slope or leaking. It is natural for the evaporator to produce a small amount of water in average conditions; however, this may be significantly greater in humid conditions.