AC Maintenance in Hermann, MO

What each AC maintenance visit includes

Every tune-up should cover the items on ENERGY STAR's checklist. Use this as your list, for us or for anyone else.

Why book an AC tune-up in spring?

Spring work finds problems while there is still time to fix them on your schedule. The Department of Energy says annual maintenance can improve comfort and efficiency and extend the unit's life. ENERGY STAR adds that too much or too little refrigerant makes a system less efficient and shortens its life.

Hermann gives that advice extra weight. With 27.6 days a year past 90°F (BestPlaces), run times are long, and river-valley humidity keeps the coil wet and the drain working. Cottonwood fluff and yard debris build up on the outdoor coil over the same weeks. Keeping that coil clean is plain housekeeping, and it is cheaper than a compressor.

Tune-up, coil cleaning or do-it-yourself: how they compare

These are three different levels of care, and most homes need the first and third every year.

How the visit goes

1. We ask what you noticed last season, and check the thermostat.
2. We shut off power at the disconnect, then open and clean the outdoor unit.
3. We tighten connections and test the electrical components.
4. We inspect the indoor coil, blower and filter.
5. We clear the drain line and check the pan.
6. We restore power, run the system and check the cooling performance and refrigerant level.
7. We tell you what we found and quote anything beyond the tune-up before starting it.

What a tune-up does not cover

A tune-up is inspection and cleaning, so some work stays outside it:

• Replacement parts, such as a capacitor or contactor
• Finding and repairing refrigerant leaks, or the refrigerant itself
• Duct cleaning or duct repair
• Upgrades such as a new thermostat or filter cabinet

It also cannot promise a breakdown-free summer. If something fails, go to our AC repair page. Refrigerant handling is regulated federally: under EPA Section 608, technicians working on this equipment must be certified, so request the card from anyone you hire.

What does an AC tune-up cost?

For St. Louis, Angi's 2026 tune-up range is $125 to $200, and Fixr's January 2026 national range for central AC maintenance is $70 to $200. Those are outside figures, not our prices. Heavy coil soiling, poor access and travel can all move the number, so request a clear, upfront quote when you book.

Why Brian Grannemann Services for your spring AC visit

• Donna M. described our work as "very thorough," with safety precautions to match, and that is what a checklist visit needs.
• "Consistently shows up when promised" is how Stephanie H. put it, and that matters when you are arranging your day around a visit.
• We fix what we inspect, so a problem found in April does not need a second company.
• Our office has been in Hermann since 1998, at 124 E 10th St, with hours Monday to Friday, 8 AM to 4 PM.

Booking ahead, close to home or farther out

Call (209) 563-1270 in late winter or early spring, and have the unit's age handy. A homeowner spring AC maintenance checklist covers what to do before we arrive. Pair this visit with a fall furnace tune-up and both seasons are handled. We book AC maintenance from Hermann through Rhineland, Berger, Morrison and Marthasville.