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The Mendoza Blog

Straight answers about your AC, heater, and everything in between — from the techs who actually do the work in Tampa.

Mendoza Heating and Air technician at work

Latest posts

Ductwork in a Tampa attic — duct condition is part of honest AC sizing

How Humidity Changes AC Sizing in Tampa Bay

Cool but clammy is a sizing problem. The two loads every Tampa AC carries — and why bigger is damper.

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Heat pump being tested with gauges by Mendoza Heating and Air in Pasco County, FL

Heat Pump in Pasco County: Repair or Replace?

Year-round run hours change the math. The $5,000 rule, the refrigerant factor, and when a repair is still worth it.

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Heat pump condensers installed by Mendoza Heating and Air in Tampa, FL

Heat Pump Not Heating? What Tampa Homeowners Should Check

Defrost or disaster? The 5 checks to run before you call — and how to spot AUX heat quietly tripling your power bill.

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Air handler and condensate drain line in a Tampa attic, serviced by Mendoza Heating and Air

AC Drain Line Clogged? Tampa's Most Common Breakdown

AC shut off by itself or water on the ceiling? The signs, the 15-minute vacuum fix, and how to keep it clear.

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AC condenser outside a Tampa home
Oct 20, 2026 · Repair vs. Replace

What is the $5,000 rule for AC repair?

One multiplication — repair cost times system age — tells you whether to fix it or replace it. The math, worked examples, and when to break the rule.

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Indoor air handler during a tune-up
Oct 20, 2026 · Maintenance

What does an AC tune-up include?

The full checklist, what we actually find, and why fall is the time — plus the $75 special through Nov 30.

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Outdoor AC unit
Oct 20, 2026 · Troubleshooting

AC not cooling? 7 checks before you call

Half of no-cool calls are a two-minute fix. Run through these first — and know exactly when it's time to call us.

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Technician servicing a rooftop unit
Oct 20, 2026 · Heating

Heater not working? Tampa's first-cold-night playbook

Thursday night drops to 57°. Here's what to check when the heat won't kick on — and when to call before the rush.

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New condenser installed by Mendoza Heating and Air
Oct 20, 2026 · Heating & Cooling

Heat pump vs straight cool: what's best for Tampa?

Most homeowners don't know which system they have — until replacement time. The honest breakdown, Tampa edition.

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How UV lights work inside an air handler
Oct 20, 2026 · Air Quality

UV Lights & Air Quality: What They Actually Do

What UV kills, what it doesn't touch, and why Tampa humidity makes it make sense. No magic-purifier talk.

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Goodman condenser on a concrete pad beside a Tampa home
Oct 24, 2026 · Troubleshooting

AC Humming But the Fan Won’t Spin? Causes & Fixes

Power is reaching the unit but the fan sits still. Usually a failed capacitor — and one thing you should never do.

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Air handler and electrical disconnect box in a Tampa home
Oct 24, 2026 · Troubleshooting

AC Breaker Keeps Tripping? Causes & Fixes

Reset it once — if it trips again, something is wrong, and every reset risks real damage.

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Air handler installed in a closet with new refrigerant lines
Oct 24, 2026 · Troubleshooting

Thermostat Set to 72 But Reading 79? Causes & Fixes

It’s usually not the thermostat — it’s airflow, refrigerant, ducts, or sizing. How to tell which one.

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New condenser installed on a raised stand in Tampa
Oct 20, 2026 · Troubleshooting

AC Short Cycling in Tampa — Why Your Unit Turns On and Off Every Few Minutes

On, off, on, off — every few minutes. That pattern wears out your compressor and spikes your bill. The causes, the free checks, and when to call.

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Indoor air handler and ductwork
Oct 20, 2026 · Troubleshooting

AC Freezing Up? Why It Happens

Ice is never the disease — it's the symptom. The real causes, what to do right now, and what to never do.

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Outdoor AC condenser unit
Oct 20, 2026 · Troubleshooting

AC Smells Like Burning? Read This First

One burning smell is harmless and gone in 20 minutes. The other means shut it off at the breaker, right now.

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AC acting up right now?

Skip the reading — call (813) 770-2722 and we'll get a tech out. 24/7 emergency service across Tampa Bay.

Call (813) 770-2722 $75 Tune-Up — What's Included