You may think that anything to do with HVAC is really complex. The reason for that is because a lot goes into this type of system. That said, the tips below will be a huge help.
When seeking a new contractor, ask loved ones for referrals. They'll often have already had someone in for similar work and will know who to trust and who to avoid. If your family hasn't used anyone, ask co-workers or other people you trust in your community for some references.
When a contractor gives you a list of references, be sure to make use of it. Call the people on the list and ask about the quality of the work, how closely they came to their quote and whether or not the work was completed according to the promised timeline.
Every spring you need to make sure your condenser fan's coils and blades on the fan part are clean. For safety, always turn the power off first. Next, pop off the grill, pull out the blades and start cleaning them and the unit itself off gently.
Make sure that your contractor provides a home assessment. Not every HVAC solution is for everyone. Your home could have special needs for heating and cooling. Your contractor should do a walk around of your space to judge what is best. If they aren't be sure to request one.
If your evaporator coil, found inside your home, becomes dirty, your unit will lose efficiency. Just pop off the front panel of the furnace and check to see that the coil is dry. Using a brush attachment on a vacuum, gently clean the coil of any dust or other debris.
If you want to seriously extend the life of your HVAC system, as well as cut down your overall power bill, install ceiling fans in commonly used warm season rooms. Energy-star certified ceiling fans can sometimes cut your HVAC use in half. However, you won't physically notice a difference in temperature.
If you currently have a manual thermostat, consider installing a programmable one. You can set your system for different temperatures depending on time of day and if anyone is home. Also, you can set upper and lower temperature settings to allow for a comfortable range of temperatures so that heating and cooling don't kick in when not needed.
This article offered a lot of information about HVAC systems. It can be tough to get going if you lack motivation, so keep your interest level high. The various issues will make more sense to you and you will find yourself pleased that you invested the time to learn.