Finding ice frozen on your heating, ventilation and air conditioning system is common when the system is not working properly. This can happen even in the peak summer season too. The reasons for a frozen HVAC system are many and they are:
Refrigerant level: The refrigerant in an air conditioner needs to be up to a certain level for it to function properly and provide cool air. If the refrigerant levels are less due to leaks or due to faulty installation, then the evaporator coils could become cold and even freeze. You cannot fix it yourself, it is best to call a HVAC technician to fix the faults and fix the refrigerant to prescribed levels.
Air filter: If there is proper air flow then the HVAC system will not freeze but if there is low air flow then there is a lot of pressure on the evaporator coil and it freezes. It is essential to clean the air filter regularly so that the air flow is not impeded.
Supply registers: Supply registers are usually closed in some areas of a building to save on energy and energy bills. But closing more than twenty percent of your supply registers can freeze your HVAC system. So ensure that only those registers that need to be closed are closed because by trying to save on energy bills you may be paying more on repair bills.
Fan speed:The fan speed needs to be sufficient for proper air flow and with proper fan speed an air conditioner will not freeze.
Drainage: The air conditioner not just cools the air, it removes the humidity from the room. The moisture that is removed is condensed and collects in the condensate pan and then drains out. Sometimes the drainage gets blocked by dust and dirt and when it is not cleaned the evaporator coil is not able to function properly and the system freezes. You should clean the drain pipes regularly so that the HVAC system keeps functioning well.
Though frozen HVAC systems are a problem which many people face, it can be easily taken care of. All you need to do is to enlist a HVAC services company to do maintenance services regularly. Proper maintenance of the HVAC system will ensure that the system does not freeze. Hiring the right HVAC company is very important. There are many HVAC companies that specialize in HVAC maintenance and repair, to find them all you need to do is search them on the internet and then short list a few companies. To short list you need to check if the companies have the right licenses. Each state has different licensing norms, so you need to check if they have the proper licences to function in the state. Next you need to check if they are bonded and insured. Insurance is of paramount importance because if there are any unforeseen accidents and if the technicians do not have insurance you as the homeowner will be liable to pay damages. Check and select the best HVAC company for your needs.