Thermal Expansion Valve Replacement in Miami | Mobile TXV Service – Auto A/C Repair LLC

Thermal Expansion Valve (TXV) Replacement — Miami-Dade

Mobile TXV replacement, TXV diagnosis, and A/C recharge (R-134a & R-1234yf). We come to you in Hialeah, Doral, Miami Lakes, Kendall, Coral Gables & Miami Beach.

📞 Call (786) 483-9406 📝 Get a TXV Estimate

TL;DR: If your A/C is cold while driving but warm at idle, shows high low-side pressure, or the evaporator frosts, a stuck TXV or clogged screen may be the cause. We diagnose superheat/pressures, replace the thermal expansion valve, evacuate and recharge (R-134a / 1234yf), and verify vent temps—on-site.

When the Thermal Expansion Valve Is the Problem

A/C cold while driving, warm at idle → TXV sticking / incorrect superheat
High low-side pressure with poor cooling → TXV stuck open / flooded evap
Low low-side, evap frosting → TXV stuck closed / starved evap
Intermittent cooling → debris at TXV screen or bulb charge issue
After compressor/condenser replacement → TXV contaminated or not metering correctly

TXV Replacement — What We Do On-Site

Performance test & pressure readings (idle & 1500–2000 rpm, ambient noted)
System recovery & evacuation (R-134a or R-1234yf)
TXV replacement with new O-rings/gaskets; clean or replace screen as applicable
Vacuum hold & recharge by weight; verify superheat, vent temps & pressures
Leak check (electronic/UV) and final inspection

TXV Replacement Pricing

Diagnostic: $95/hr (credited toward repair if you proceed)
Labor: access varies by model (1.5–5+ hours)
Parts: thermal expansion valve (TXV), seals/O-rings, desiccant/drier if needed
Refrigerant: R-134a or R-1234yf billed by weight after evacuation

We provide a written VIN-based estimate before any work begins.

Mobile Coverage — Miami-Dade

Hialeah • Doral • Miami Lakes • Kendall • Coral Gables • Miami Beach • Homestead

Related A/C Services

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Frequently Asked Questions

Do you replace thermal expansion valves near me?

Yes—mobile TXV service across Miami-Dade (Hialeah, Doral, Kendall, Miami Lakes, Coral Gables, Miami Beach, Homestead).

How long does a TXV replacement take?

Most vehicles take 1.5–5 hours depending on access to the valve and lines.

Can you recharge R-1234yf on-site after replacing the TXV?

Yes—we service both R-134a and R-1234yf and recharge by weight after a proper vacuum hold.

How do you confirm a bad TXV?

We check high/low pressures, superheat behavior, frost patterns, and rule out compressor, condenser, and blend-door faults.

Miami-Dade Customers on Our TXV Service

“A/C was cold only while driving. They diagnosed the TXV, replaced it and recharged 1234yf on-site—now it’s cold at idle too.”

— Verified Customer

See more on our Google reviews.

📞 Call Now (786) 483-9406

🌬️ Thermal Expansion Valve Replacement in Miami-Dade

Having trouble with weak cooling or inconsistent A/C performance? Your Thermal Expansion Valve (TXV) may be stuck or failing. At Auto A/C Repair LLC, we bring expert TXV replacement service directly to your location—no shop visit needed! 📞 Call us now at (786) 483-9406 for same-day mobile service across Miami-Dade County.

Technician replacing TXV valve in heavy-duty truck A/C system

🔧 Symptoms of a Failing TXV

Inconsistent cooling performance
Frost buildup on the evaporator
High or fluctuating refrigerant pressure
A/C blows warm at idle, cold while driving
Unusual hissing noises from A/C system

🚚 Who We Serve

We provide mobile TXV replacement for:

Cars & SUVs
Heavy-duty trucks
Delivery & commercial fleets
Dealerships & job sites

🛠️ Our Mobile Service Advantage

100% Mobile A/C Repair – No towing or waiting
Certified TXV diagnostics & replacements
Free on-site estimate before repair
OEM or high-quality aftermarket valve replacements

📞 Schedule Your TXV Replacement Today

📍 Service Areas

We serve the entire Miami-Dade County region, including:

Hialeah
Miami
Doral
Miami Lakes
Miami Beach

🔗 Related A/C Repair Services

❓ Frequently Asked Questions

What is a thermal expansion valve (TXV)?

It’s a key A/C component that regulates refrigerant flow into the evaporator to keep your cabin cool.

How long does TXV replacement take?

Typically 1–2 hours depending on the vehicle type and location of the valve.

Can I drive with a bad expansion valve?

It’s possible, but not recommended. A faulty TXV can damage the A/C compressor over time.