Mar 16th 2026
Quick Answer Box What is a TXV in an HVAC system? A TXV, or Thermostatic Expansion Valve, is a metering device that controls the amount of liquid refrigerant entering the evaporator coil. It modulates…
Published by HVACProSales Team
Mar 16th 2026
Quick Answer Box How do you clean an HVAC flame sensor? To clean a flame sensor, first, turn off all power to the furnace. Remove the sensor, which is a thin metal rod located in the path of the burne…
Published by HVACProSales Team
Mar 16th 2026
Quick Answer Box Why is my AC compressor not starting? An AC compressor typically fails to start due to electrical issues. The most common culprits are a failed capacitor, a faulty contactor, or a tri…
Published by HVACProSales Team
Mar 16th 2026
Quick Answer Box What do mini split error codes mean? Mini split error codes are diagnostic signals indicating a specific problem. Common codes include E1 (communication error between indoor and outdo…
Published by HVACProSales Team
Mar 2nd 2026
Mini Split Not Heating: A Complete Troubleshooting Guide A mini-split heat pump that’s not heating is a common issue that can leave your customers in the cold. The causes can range from simple…
Published by HVACProSales Team
Feb 16th 2026
Mini Split Not Cooling: A Complete Troubleshooting Guide A mini-split system that’s not cooling is a common complaint that can have a wide range of causes, from simple issues like a dirty filt…
Published by HVACProSales Team
Jan 26th 2026
AC Compressor Won’t Start: A Technician's Troubleshooting Guide An air conditioner's compressor is the heart of the system, responsible for circulating refrigerant and enabling the cooling pro…
Published by HVACProSales Team
Jan 19th 2026
Condensate Pump Not Draining: A Comprehensive HVAC Troubleshooting Guide A condensate pump is a small but critical component in many HVAC systems, especially those with indoor air handler units locat…
Published by HVACProSales Team
Jan 12th 2026
MRCOOL Mini Split Error Codes: E1 & P4 Troubleshooting Guide MRCOOL mini-split systems have become a popular HVAC solution for homeowners and contractors alike, thanks to their energy efficiency, eas…
Published by HVACProSales Team
Jan 5th 2026
Mini Split Vacuum Won't Reach 500 Microns – HVAC Troubleshooting Guide One of the most common and frustrating problems HVAC technicians face during a mini-split installation is the vacuum pump…
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