A; How often to change your air filter can depend on many factors. Such as if you have pets, or live on a dusty road. The best way to know when it is time to change your air filter is to look at it. If you are unable to see light threw the filter then it is time to change it.
A; Ice build up can be caused from many different things. One of the major ones is low air flow. Check these things, if that is not the problem contact Walker Company for air conditioner maintenance or repair.
A; Once a year. Usually cooling equipment should be serviced in the spring and heating equipment should be serviced in the fall. Having your heating and cooling equipment serviced annually will allow your equipment to operate at the peak of its efficiency and prevent premature failure of its components. Walker Company offers affordable maintenance agreements to keep your equipment operating for many years to come.