This one shows the simple failure codes for Carrier, Bryant, Payne furnaces built in the late 90s to present. This video is part of the heating and cooling series of training videos made to accompany my websites: www.graycoolingman.com and www.grayfurnaceman.com to pass on what I have learned in many years of service and repair. If you have suggestions or comments they are welcome.If you are a homeowner looking to repair your own appliance, understand that the voltages can be lethal, the fuels are highly flammable and high pressures are used. Know your limits.
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This one shows the simple failure codes for Carrier, Bryant, Payne furnaces built in the late 90s to present. This video is part of the heating and cooling series of training videos made to.
All manufacturers are different especially ignition control module or circuit board manufacturers. Not every OEM or furnace manufacturer makes their own circuit control boards or ignition control modules. Many of the gas furnace manufacturers will purchase these from third parties and install them in their gas furnaces. The following is simply a generic guide to assist you in finding a problem, however, we always urge you to read our disclaimer and to contact a professional HVAC Technician to. Gas Furnace Troubleshooting and Repair - Flash Codes Fault CausesRemember there is a normal flash when everything is good with the gas furnace. Just because the module or circuit board is flashing doesn’t mean there is a problem. A steady flash typically means everything is good.
There are problems when you have intermittent flashes and when that occurs you usually will have a problem. Most manufacturers will put a flash code chart on or near the ignition module or circuit board. This flash code chart will describe the problem. Problems can be in one of five areas for the gas furnace:. Ignition Problem. Blower Problem.
Inducer or Pressure Switch issue. HVAC Accessory Problem (accessories can be an or a ). Gas Furnace Troubleshooting and Repair - Flash Codes Components Faults ExplanationWithin those fault codes, you can have a host of issues with various gas furnace components such as:. Bad switch. The furnace has many different safety switches inside it including a pressure switch and various temperature switches. Some of these are both automatic reset and manual reset. Automatic reset switches are not so bad the problem is the manual reset switches.
When a homeowner continuously resets a manual reset temperature switch they are creating a possibly dangerous situation. Especially after the switch is manually reset because it tripped over a serious problem occurring. And the problem does not necessarily mean it is the switch that is the problem.
However, it could be another component or issue causing the switch to trip. These switches do fail from time to time.
However, they are designed for safety reasons and constantly resetting them presents a possible serious danger to the occupants. The matter needs to be looked at closer to make there are no further problems beyond a bad switch. Flame problem or a sensor problem?. Power problem?. Module or circuit board problem?. Other problem outside of the electronics that is causing the malfunction?
Gas Furnace Troubleshooting and Repair - Flash Codes Service and RepairI responded to a call one January night when it was around 15° F. For an emergency no heat call.
The homeowner had previously reset a manual switch (several times) which was a very important safety switch. This switch in is referred to as a spill switch or a hood switch. It is placed near the ventilation for the flue gases to allow atmospheric air to mix with the flue gases. It helps gases go up the flue easier. The carbon monoxide detector started sounding the alarm. They can thank God they had a carbon monoxide detector (many people do not) and it was functioning properly.Turned out that during the summer months a bird had built a nest at the top of the chimney.
It was partially blocking the flue gases escaping the top of the chimney. The flue gases backed up and started spilling out of the hood. This is where secondary atmospheric air should be venting into the flue gas stream and not out of it.
The switch worked perfectly as designed but because the homeowner kept resetting the manual switch it created a serious hazard that could have led to death.The homeowner had figured out the problem using diagnostic codes on the board. They traced the problem out to that switch. This was gas boiler by the way. By resetting the switch he placed his family in grave danger. However, luckily, everything turned out good and everyone was healthy.
So when you do read the flash codes and try to fix it yourself is it really fixed? Gas Furnace Troubleshooting and Repair - Flash Codes ConclusionThis is why it is necessary to call a professional and let them resolve the issue. They can resolve it safely and efficiently before you reset that manual safety switch for the umteenth time. I’m not trying to scare anyone.
However, from my experience of several years in the field working as an HVAC Technician, I have observed some real disasters that could have been avoided had they consulted a professional.Gas Furnace Troubleshooting and Repair - Flash Codes Resource, Learn More HVAC and About the Author. HVAC Random Tip BoxHVAC Tip - Did you know the human body produces approximately 250 BTU/h when sleeping? Here is a basic list of the approximate BTU/h produced by the human body for various activities:.
Watching Television - 400 BTU/h (any sedentary activity). Cleaning the house - 700 BTU/h (moderate activity). Mowing the Grass w/push mower - 1800 BTU/h (heavy activity). Running a marathon - 2400 BTU/h (extreme activity)The number of people occupying a dwelling or space is a consideration in the load calculation for sizing air conditioning systems simply because humans do give off heat. BTW, the Matrix over blew the numbers. In the movie Morpheus states humans give off over 25,000 BTU's. Only the author of this website is that hot.)))))).