Red-tagging is characterized by the installation of a red tag on a furnace, stating that it has been shut down and is dangerous to operate unless repaired or replaced. Questions are: Is this enough action to prevent the building owner from turning the furnace back on? And what other steps are necessary such as contacting the local utility company?
Safety of the appliance should be the primary goal of all technicians. The production of carbon monoxide (CO) in the flue gases should be kept below 100-ppm air-free, even though the allowable limit in the stack is 400-ppm air-free.
An air conditioner coil can be a perfect breeding ground for mold and bacteria. This mold and bacteria buildup on a coil can cause a variety of indoor air and other problems. What to do? Glad you asked.
Consumer comfort with high-tech toys, combined with rising energy prices, have created a good market for manufacturers of thermostats and controls. It’s a far cry from a few years ago, when too many homeowners were too willing to override the energy-saving settings on their programmable t-stats.
Dirty Sock Syndrome started appearing a decade or more ago. Since then, people have tried to figure out the source and what to do to solve the problem. A couple of companies have developed coating solutions.
If what has transpired over the first three months since Title 24 went into effect is the norm, business may remain as usual for contractors in California this year. And, that's what scares law-abiding HVAC contractors in California.
The compressor's discharge temperature is often an overlooked temperature when troubleshooting a refrigeration or A/C system. However, it's very important because it's an indication of the amount of heat absorbed in the evaporator and suction line, and any heat of compression generated by the compression process.
Superheat is probably the most talked about, yet misunderstood, technical term used by technicians. Superheat on the system's low side can be divided into two types: evaporator superheat and total (or compressor) superheat.
Condensing temperatures often give technicians valuable hints as to what the problem may be within a refrigeration system. The high side of the refrigeration system offers valuable information to the wise technician.