About Call a Tech Last

Who runs this site

My name is Marcus D. I’m a master HVAC and appliance technician, and I’ve worked on homes in and around St. Louis for more than 20 years. That covers a lot of ground: furnaces and boilers in Clayton basements, heat pumps that struggle through a humid Missouri summer, kitchen appliances in tract housing out past Arnold, and the plumbing and electrical problems that come attached to all of it. Old houses, new houses, and the odd in-between.

Master certification means I’ve tested and worked long enough to see the same failures repeat across brands and price points — and to know which ones a homeowner can fix on a Saturday and which ones need a truck, a license, and a permit. That’s the knowledge this site is built on.

Why “Call a Tech Last”

The name isn’t a slogan about avoiding service calls. Plenty of jobs need a technician, and I’d rather you call one than get hurt. The name is about the order of operations.

In the field, two things happen over and over. First, homeowners pay for a service call before checking things anyone can check — a tripped breaker, a clogged filter, a closed gas valve, a fridge coil packed solid with dust, a GFCI that did its job. Second, homeowners pay for equipment replacements they didn’t need, because nobody explained that a $40 part would have restored it.

Calling a tech last means: check the simple things, in the right order, understand what the machine is telling you, and call in a pro when you’ve hit the actual limit of safe DIY or when the diagnosis points to work that needs a license. You’ll either fix it for parts money or you’ll call with a real description of the problem instead of “it’s not working.” That second call usually costs less, because the tech isn’t spending the first hour on guesswork.

What this site will never do

• Sell reader information. No names, emails, or browsing data leave this site for money — not to contractors, not to lead brokers, not to anyone.
• Take money for rankings. If a part, brand, or tool is recommended, it’s because it holds up in the field, not because someone paid to be listed.
• Tell a homeowner to do dangerous work. Gas piping, refrigerant handling, panel work beyond a breaker reset, and anything involving a flue — that gets a stop line, not a tutorial.
• Fake reviews or testimonials. There aren’t any on this site. The guides either make sense to you or they don’t.
• Pretend a price is a quote. Prices are ranges, in 2026 dollars, for parts and typical labor. Your neighborhood, your house, and your access to it move the number.

How the content is written

Every guide starts from field experience: the order checks actually get run in, the failure rates that show up across brands, and the repair prices that are common in the St. Louis market. Then it gets checked against manufacturer documentation — service manuals, wiring diagrams, error-code tables, spec sheets — so the codes and procedures match what the maker published, not what got repeated on a forum in 2011.

Where manufacturers differ or a model family has a known quirk, the guide says so. Where a range is wide, the range stays wide instead of getting narrowed to a number that looks confident and isn’t.

If something here is wrong or out of date for your model, the contact page is open. Corrections are welcome and common questions turn into future guides.