Condensing Unit Reviews Category Index

Boiler Pressure Problem

Boiler Pressure Problem - Hello, where I live, it’s mostly gas furnaces with air conditioners or heat pumps. My boiler just started causing problems with high pressure. I work in HVAC as a technician but do not have a lot of experience with hot water or steam boilers....

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Honeywell Zone Valve Problem

Honeywell Zone Valve Problem - I have a Honeywell zone valve (8043E). I have spent time trying to understand exactly how this valve works, and I am pretty close, except for one thing: the motor. When the thermostat makes, that causes the slow-motion motor to turn,...

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HVAC Random Tip Box

HVAC Tip - A thermocouple is commonly used in standing pilot gas furnaces and water heaters are technically referred to as a copple element and produces millivolts when heat is applied to the tip. This millivoltage is necessary to keep the pilot valve inside the gas valve open. If the pilot flame goes out, the thermocouple stops generating millivolts. Without the millivolts, the valve closes thus preventing gas from escaping when there is no flame. Thermocouples fail because of oxidation. It is recommended that you keep the pilot lit throughout the year to prevent excess oxidation. The thermocouple can be found in many different types of gas furnaces, gas logs, and gas water heaters. Learn How to Test a Thermocouple with a Multi-Meter