An HVAC tune-up that puts a meter on things
A real tune-up produces numbers: capacitance, refrigerant charge, temperature rise, static pressure, combustion readings. Those numbers are what tell you a part is failing while it is still working. A visual once-over tells you nothing until something has already broken.
What we expect to find
Neglect shows up in a predictable order. Tell us when the system was last properly serviced and we will tell you honestly what tends to be waiting.
Overdue check
Based on what we typically find on systems at each stage. Not a diagnosis, but it is rarely far off.
Systems in dusty homes, homes with pets, or houses near open farmland load their filters and coils faster than average. So does a system that runs year round, which is every heat pump and ductless system.
What a tune-up covers
Not every item applies to every system. What does apply gets measured and written down, so you have a record and so next year's readings mean something.
- Electrical values measured. Capacitors tested against their rated microfarads, contactors inspected for pitting, connections checked for heat damage. A capacitor drifting out of tolerance is a scheduled part rather than a July breakdown.
- Refrigerant charge verified. On anything with refrigerant, checked against manufacturer spec rather than topped up on instinct. A slow leak shows as a performance change long before a failure.
- Combustion tested. On anything that burns fuel: gas pressure, temperature rise and draft measured to spec, plus a heat exchanger inspection. On oil, the nozzle and filter get replaced as consumables.
- Coils cleaned. The outdoor coil so the system can shed heat, the indoor coil checked for restriction. A dirty outdoor coil makes a healthy system behave like a failing one.
- Condensate cleared. Drain line, pan, float switch and pump. This single item prevents the most common summer callout we take.
- Airflow and filtration. Filter condition, return air, and static pressure where relevant. Restricted airflow causes symptoms that look like far more expensive problems.
- Safety controls proved. Limits, rollout switches, pressure switches and low water cutoffs tested rather than assumed working.
- Controls and thermostat. Calibration, staging, and on heat pumps whether auxiliary heat is engaging only when it should.
- Written findings. What was measured, what it read, and what is trending. Your manufacturer warranty may well require exactly this record.
Not all tune-ups are the same job
Cheap tune-up offers are common in this trade and they are not all bad. Some are a genuine loss leader. Others are twenty minutes and a sales pitch. Here is how to tell which one you are getting.
What a real one looks like
- An hour or more on site for a single system, longer on oil.
- Meters come out. Capacitance, temperature, pressure, combustion.
- You get numbers afterwards, not just a verbal all clear.
- Findings are ranked into what needs doing now, soon, and what is simply worth watching.
- Consumables are replaced where the service includes them, particularly on oil.
What to be wary of
- Twenty minutes and gone. There is not time to measure anything meaningful.
- A visual inspection only, with no instruments used at any point.
- No paperwork, so nothing to compare against next year.
- An immediate large quote for work that is presented as urgent without evidence.
- Refrigerant added without anyone looking for the leak that made it necessary.
Ask for the numbers. Whoever services your system, ask what the capacitor measured and what the temperature rise or split was. A technician who did the work will tell you without hesitating. It is the simplest way to know which kind of visit you paid for.
Tune-up or service plan
A tune-up is a single visit you book when you want it. If you are going to be doing this every year anyway, the arithmetic usually favors the plan.
- Book a tune-up if you want one system looked at now, you have just moved in and want to know what you inherited, or you are getting a second opinion on something another contractor said.
- Take a plan if you would rather it were scheduled for you, you want priority when the weather turns, or you have year-round equipment that needs servicing twice regardless.
- The scheduling difference is the real one. During the first freeze or a heat wave, plan customers get booked ahead of everyone else, and that is precisely when availability across the region disappears.
These people are fantastic! They truly service the unit. I've watched other companies do nothing but clean the filters. Well worth my contract!
AlGoogle reviewTune-up questions
Tell us what you have
What is in the house, roughly how old it is, and when it was last serviced. If you cannot remember, say so, because that is useful information in itself.
Next steps and neighbors
Get it measured properly
One visit, real instruments, and a written record of what everything read. Book it in a shoulder season and it is an appointment rather than a queue.