Thermostat Not Working? We’ll Find the Real Cause and Fix It Right.
Blank screen? Wrong temperature? System won’t turn on?
Three Guys provides fast, honest thermostat diagnostics and repair by certified HVAC and electrical specialists — restoring your comfort the same day.
Book Your Thermostat Repair Now
Signs Your Thermostat Needs Repair
Your thermostat is the “brain” of your HVAC system — when it stops working, your system doesn’t know what to do.
Here’s when to call our team:
- Thermostat screen is blank or unresponsive
- System won’t turn on or off properly
- Temperature feels inaccurate or delayed
- Short cycling (on and off every few minutes)
- Error codes or flashing icons
- Battery replacement didn’t help
- A/C runs but no cool air blows
Schedule a $100 diagnostic visit, and we’ll pinpoint the true issue before you spend money on unnecessary parts.
It’s Not Always the Thermostat
Most “bad thermostat” calls aren’t caused by the thermostat itself.
Here’s what we often find instead:
- Clogged drain line trips the float switch, cutting power to the air handler (and thermostat).
- Failing transformer or loose wiring intermittently kills power
- High static pressure or safety cutoffs trigger shutdowns to protect the system.
That’s why we start with a $100 diagnostic — and if repair or replacement is needed, that amount is credited toward your final cost.
We verify the true cause before replacing anything, so you don’t waste money or time
Transparent Pricing & Flat-Rate Service
Service
Description
Price
System Diagnostic / Thermostat Check
Full inspection of thermostat, wiring, safety circuits, and control board. Includes $100 credit toward repair.
$100
Customer-Provided Non-Programmable Thermostat Install
Install and configure a non-programmable thermostat you’ve purchased. Includes wiring verification and testing.
$100
Customer-Provided Smart Thermostat Install
Install and configure a thermostat you’ve purchased. Includes wiring verification and testing.
$350
Standard Digital Thermostat Install
Professional-grade, non-programmable thermostat. Includes parts, labor, and setup
$350
Three Guys Smart Thermostat Instal
Wi-Fi connected smart thermostat with app control and alerts. Includes both thermostat and labor.
$400
Not sure which option you need?
Call Us — we’ll guide you from there.
Common Causes of Thermostat Problems
Because we’re licensed in both HVAC and Electrical, we handle every root cause safely and correctly.
Upgrade to the Three Guys Smart Thermostat
If your thermostat is outdated, upgrade to a smarter, connected comfort system designed to keep your home protected and efficient—whether you’re there or not. Three Guys Smart Thermostat includes:
- Remote control via app
- Smart scheduling to save energy
- Real-Time System Monitoring & Alerts If your system isn’t reaching the set temperature or starts underperforming, both you and our team are notified instantly
- Proactive Service from Our Team We get alerted too—so if your A/C stops working while you’re away, we can reach out and help schedule service before you even get home
This isn’t just a thermostat—it’s peace of mind. No more coming home to a hot house or worrying about your pets while you’re away.
Pair It With Preventive Maintenance
Thermostat failures often come from deeper system issues.
Our tune-ups check for:
- Drain line clogs (includes Drain IV System options)
- Airflow and duct performance
- Voltage irregularities
- Filter and coil condition
Membership Benefits
Every thermostat repair or install is backed by a 2-Year Parts & Labor Warranty for active members.
Membership includes
- 10% Off All HVAC & Electrical Services
- Annual Precision Tune-Up ($300 value)
- 2-Year Repair Warranty
- Exclusive Rebates & Promotions
- Priority Emergency Service
- No After-Hours Fees
- Credit toward future electrical upgrades
- Drain IV Top-Offs during tune-ups
- Every Dollar Builds Credit Toward Your Next System Replacement
Our Promise
At Three Guys A/C & Electrical, we don’t guess — we measure, verify, and stand by every repair we perform.
Our promise to you:
Fast, honest, and reliable service — no upsells or gimmicks
Certified HVAC and electrical expertise under one roof
Transparent pricing and same-day repairs whenever possible
Respect for your time, property, and peace of mind
- Your comfort isn’t just another job — it’s our reputation.
Recent Jobs, Reviews & Check-Ins Across Tampa Bay
See where our technicians have been helping homeowners throughout Clearwater, St. Pete, Tampa, and nearby areas.
Frequently Asked Questions
My thermostat screen is blank. Is it broken?
Not always. Most blank thermostats in Florida are caused by a float switch cutoff from a clogged drain line, not a bad thermostat. We’ll test and confirm before replacing anything
Can I install my own thermostat?
You can, but DIY installs often cause wiring shorts or blown control boards. Our technicians are licensed in both HVAC and electrical — ensuring safe, warranty-backed installation.
How much does thermostat repair cost?
Most thermostat-related diagnostics start at $100. If repair or replacement is needed, that fee is applied toward your total service.
Do you repair smart thermostats like Nest or Ecobee?
Yes — we repair and install all major brands including Nest, Ecobee, Honeywell, LG, Daikin, and our exclusive Three Guys Smart Thermostat.