We’ve written before about the importance of having your furnace’s heat exchanger regularly checked by a professional. This is a part of our routine preventive maintenance program, the Ultimate Service Agreement, and it’s a vital inspection to make sure that a furnace operates as safely as possible. What our technicians look for when they examine a heat exchanger is signs of cracks along it or corrosion that can lead to those cracks. A cracked heat exchanger can allow toxic combustion gases to escape into the airflow moving into the rooms around a house—a dangerous situation!
Furnace owners often feel nervous when they learn their furnace may pose a safety risk. This leads to the question whether they should have the furnace repaired—which means replacing the heat exchanger—or instead have a new gas furnace installed.
As one year ends and another begins, you will probably take a look over your house to find various cleaning and improvement projects. One that you may not have thought of, but which is a critical job to have done on a regular basis, is 
It looks like we’re going to enjoy a warm—or at least moderately cool—Thanksgiving here in the Central Valley. We can’t expect this to last, of course. By the end of December, the heating systems in our homes will be working regularly, and they’ll keep up their hard work through until April.
If you’ve had the same furnace in your home for many years, you’re probably accustomed to it having a pilot light. If you have newer furnace, or you’re planning on having one installed in the near future, it probably doesn’t use a pilot light at all. Instead, an electronic ignition system ignites the burners. In fact, you rarely see standing pilot lights on newly manufactured furnaces anymore. Why did this change happen? Let’s take a look. 
Are you looking into having a new heating system installed this fall? It’s a great season to schedule this kind of major HVAC job: you’ll be ready in time for the winter cold, and it’s easy to have it arranged with our installers at a convenient time.
Temperatures are still warm and sometimes hot here in the Central Valley as we enter into the official beginning of fall. 
Refrigerant loss is one of the major problems an air conditioning system may encounter during its service life. And it’s not only a problem that occurs in aging, over-the-hill ACs. An air conditioning system that’s been in service for around 5 to 6 years can develop corrosion along its refrigerant lines because of exposure to formaldehyde in the air. It’s wise to always watch for indications that your AC, no matter how old it is, may be losing refrigerant to leaks:
The question in the title may at first sound a bit strange. Why would you cool your attic at all? You almost never go up there, and there’s no reason to provide cooling (or heating) for it during the year.
One of the services we offer our customers is complete 
Now that it’s May, we’re deep into the allergy season. This time of year can be miserable for people who suffer from pollen and grass allergies, leading to the dreaded “hay fever.” Even for people who don’t have specific allergies like these, the high pollen count in the air can add an extra level of irritation to the day from an itchy nose to mild headaches.