Not all air conditioning issues require a call out – here are some of the common causes and our solutions to fixing them
How does it work?
An air conditioning system works by passing cold gas through a coil, which, in turn, cools the warm air as it passes over it. Consequently, as warm air passes over the coil and cools, it causes water in the air to condense onto the coil.
Moreover, the air conditioner has a drip tray located below the coil on the inside unit. Condensation that forms on the coil drips into the tray and should flow to either a drain or the outside of the property.
Additionally, some drip trays connect to a gravity-fed drain and run directly outside. However, other trays connect to a condensate pump where they can’t drain by gravity and may need to pump up and over.
Blockages
Sometimes debris blocks these drains. By locating the drain tube on the outside of the building, you can check the end for a blockage. You can also gently blow down the tube. If the air flows freely, it should be clear. Be prepared for some water to come back at you if you dislodge a blockage—you don’t want a face full of water!
Knowing Your Tubes
There are generally two types of drain tube. The pictures below should help you identify the types. The larger corrugated tube in most cases is a gravity-fed tube. The small thin tube generally attaches to a condensate pump. The good news is that clearing a gravity-fed tube should be easier. Tubes connected to condensate pumps most likely need a professional to check the pump is working and to ensure the blockage is not within the float side of the pump.
Condensate Pump Tube & Corrugated Gravity Fed Drain Tube
Gas Issues
Another cause of dripping water can be due to low gas. Low gas and lower pressure can cause water on the coil to freeze and build up. Sometimes when the unit is switched off the ice will melt. Due to the excess volume of water it can’t be drained away quick enough, causing the drip tray to overflow.
Most units have a secondary rear drip tray, this is much smaller than the main one. These trays feed into the front tray for any water to be drained away with the rest. As with the main tray this can get clogged.
Keeping on top of Maintenance
It’s important for units to undergo regular maintenance to remove any buildup of dust and dirt. Consequently, this ensures the machine is working fully. Therefore, we recommend using a qualified engineer for annual servicing to avoid such problems.
Furthermore, there are special cleaning solutions available to help keep drains clear. These solutions are simple to use and can be sprayed onto the coil at the front, underneath the filter, and do not require rinsing. Simply spray on and leave to work while setting the unit to self-cleaning mode. Additionally, it’s a good idea to do this at regular intervals to avoid a buildup of dirt.
If in doubt, always call a professional.
Finally, we are available for servicing and fault finding of all split system domestic and light commercial air conditioner/heat pumps.
Call our experienced team on 0161 427 0772, or email us at info@greenhorizonenergy.co.uk
