The E5 error code on a mini split air conditioner indicates a communication problem between the indoor and outdoor units. This code appears on the display of inverter air conditioners and shows up across many brands and models. The most common causes are wiring issues, failed communication cables, or problems with the circuit boards in… Read More: Mini Split E5 Error Code What It Means and How… »
Inches of Water Column is a method to measure gas pressure. The first devices to measure gas pressure were tubes in a U-shape, half-filled with water. The gas pressure was applied to one side of the tube from a gas line, and the other side was left open. How far the gas pressure pushed the… Read More: Types of Water Column Gauges for Gas Furnaces »
Replacing a water pump in an evaporative swamp cooler is a straightforward task that many Do-It-Yourself types of persons can do. Of course, if in doubt, be sure to call a professional. The pump will need voltage to work, usually 115 volts, so precautions need to be taken. What is a Evaporative Swamp Cooler Water… Read More: How To Replace an Evaporative Swamp Cooler Water Pump »
The average TXV replacement cost by an HVAC tech in 2025 is roughly $800-$1250. The cost to buy a TXV Valve in 2025 is roughly $50-$300. Prices can vary by location and time of year. If you have had the TXV valve replaced, let us know in the comments the cost. A TXV (Thermal Expansion… Read More: How Much Does it Cost to Replace a TXV Valve… »
With so many HVAC Vacuum Pumps to choose from, how can you make sure you’re purchasing the right one for your job? Main Things to Look for When Buying an HVAC Vacuum Pump CFM (Cubic Feet a Minute) Stage (1-Stage or 2-Stage) CFM The CFM (Cubic Feet per Minute) on HVAC vacuum pumps is how… Read More: Our Picks for Best HVAC Vacuum Pumps »
Below is the main tool list that an HVAC service technician will use to troubleshoot and fix heating and cooling problems. To see the basic HVAC tool list check out my basic HVAC tool list post here. Below I am listing the advanced HVAC service equipment, which, unfortunately, is also the most expensive. An HVAC… Read More: HVAC Tool List Advanced Service Technician Tools with Pictures »
A contactor relay is necessary component in an HVAC system that controls the power. It is what controls the voltage coming into an air conditioner or heat pump unit. The main power, usually 220 volts, comes from a breaker and is fed into the contactor. The contactor is controlled by the thermostat to turn on/off… Read More: How To Replace a Contactor Relay on an Air Conditioner… »
There are different types of furnaces and manufacturers, but below are the most common steps for a furnace to go through from start to blowing out hot air. While most furnaces will follow the below sequences of steps, there may be variations in models and manufacturers. Gas Furnace Sequence of Operation The thermostat reaches a… Read More: Gas Furnace Sequence of Operation »
The average cost to replace a Start Run capacitor by a technician is $150-$300. The average cost to replace a Start Run capacitor by a DIY person is $50-$75. The average cost of a Start Run capacitor is $15-$40. Start Run capacitors are necessary for HVAC air conditioners and heat pump systems to start motors.… Read More: How Much Does It Cost to Replace Start Run Capacitor?… »
An air conditioning compressor is the heart of an air conditioning unit and can be a real problem if not working. There are many things that can cause a compressor to stop working. Often the compressor is good, but another component has failed, which stops it from working properly. Below is a list of some… Read More: Reasons an Air Conditioner Compressor Will Not Start »