Red Tags & Yellow Tags – What Do They Mean?

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At UGI Heating, Cooling & Plumbing, we are dedicated to ensuring safety and comfort when it comes to heating, cooling, and plumbing. Our concern and efforts are to raise the bar regarding safety for both our customers and our employees, and we take careful steps when determining the health and performance of HVAC equipment.


The Red Tag procedure is implemented by our highly trained field technicians if they determine that a condition exists representing a clear and immediate threat to the safety or health of everyone who lives in your home. This can occur for a variety of reasons, such as a leak on a gas or fuel line, an appliance connector, an appliance that cannot be repaired at the time of the visit, or other issues with an HVAC system fuel line.

After an issue has been detected, appropriate measures need to be completed to correct the Red Tag situation to ensure the safety of you and your family. This can include shutting down the piece of equipment or fuel line that is creating the condition; or, if it cannot be isolated from the remaining appliances, the local gas utility will be contacted to have the gas service turned off at the meter.

The field technician is responsible for completely filling out the Red Tag, and explaining to you what needs to be done to bring your system up to code.


If your HVAC technician just ‘yellow-tagged’ your equipment, it means that they observed or encountered a condition that is not an immediate hazard, but has the potential of becoming one in the future.

The field employee is responsible for completely filling out the Yellow Tag, and needs to explain to you what needs to be done to bring your system up to code.

If a potential confined space problem is present, the technician must ask you a list of questions concerning the possibility of the presence of carbon monoxide. Your answers to these questions, will tell the technician which specific actions need to be followed. The appliance or service may then be yellow tagged.

By “Yellow Tagging” your equipment, our field technician has determined that corrective measures need to be applied to ensure your safety. Yellow Tag means that the issue can be corrected once the appropriate measures have been completed.

Carbon Monoxide & Safety in Your Home

Carbon monoxide is a colorless, odorless, tasteless gas. This poisonous gas burns with a pale-blue to yellow flame, produced when carbon burns with insufficient air. Any fuel – natural gas, propane, oil, kerosene, wood, coal or charcoal – can produce Carbon Monoxide when there is insufficient air for the combustion process.

If you are concerned about the potential presence of Carbon Monoxide (CO) in your home, you should call an expert immediately to assess the situation and to ensure that you and your family are safe.

At UGI Heating, Cooling & Plumbing, safety is always our highest concern – the safety of you and your family, the safety of your home and your community, and the safety of our employees.

Rely on UGI Heating, Cooling & Plumbing skilled HVAC contractors to help you service or repair your current system or perform an expert installation that is right for your home needs and budget – make an appointment today and ensure your home is healthy, comfortable, and safe.