18. Defrost timer will be checked. VALUE TO YOU – A defrost timer that is not working properly can cause loss of heat & can shorten the compressor’s life.

19. Reversing valve will be operationally checked. VALUE TO YOU – A reversing valve that is not operating properly can waste energy & cause a loss of heat.

20. Auxiliary heat strips will be checked. VALUE TO YOU – Heat strips that are not operating properly can cause a loss of heat or increase electric costs higher than necessary.