Gas Manifolds Gas Manifolds – The furnace manifold connects the valve with the main burners and it is important that the proper pressure be present inside the manifold for proper combustion. Manifold pressure is different from natural gas to liquid propane and this pressure needs to be set with a special instrument which the HVAC […]
Gas Furnaces category offers detailed information about gas furnaces systems.
Gas Furnace Troubleshooting and Repair – Flash Codes In the extreme cold weather there is nothing worse than losing your heating system. Here are some basic tips to checking basic things for the average person to hopefully make a quick fix so you do not have to suffer until an HVAC repairman comes.
How to Test a Thermocouple with a Multi-Meter What you will learn from this article: 1) How not to guess if the thermocouple is bad 2) Step by step procedure for testing a thermocouple with a multimeter 3) What reading you should get if the thermocouple is good 4) Lots of resource and related links […]
Trane Gas Furnace Efficiency Factors – This is a Trane gas furnace. It is also called a Trane 90 plus gas furnace because it offers efficiency levels up to 90 percent plus AFUE. Gas or oil furnaces generally cannot achieve efficiency at 100% because of impurities in the fuel including moisture. This is the reason why […]
How to Test a Thermocouple for a Water Heater How to Test a Thermocouple – Everyone who has owned a gas heater including furnaces or water heaters will know that from to time you have to light the pilot light unless you have electronic ignition that automatically lights the pilot light. Fluke 87-V Digital Multimeter Honeywell CQ100A1013 […]
2-Stage Gas Furnaces – Tips for Buyers – Two-stage gas furnaces make up over 30% of all gas furnaces installed in residences in the USA. These furnaces are rated from 80% AFUE all the way up to 95% AFUE and are more efficient than single-stage gas furnaces. When purchasing furnaces always check the ARI website for […]
Modulating Furnaces – Gas furnace manufacturers have for many years been working on modulating furnaces to make furnaces more efficient. Before modulating furnaces the highest rated (in efficiency) were two-stage gas furnaces. Then came the modulating furnaces and efficiency ranges started increasing to 98% and fractionally more than 98% for some modulating gas furnaces. Always check […]
Gas Furnace Heat Exchanger Failure – Richard, a technician just departed my house after looking at my gas furnace. My mom thought she smelled something so we called the furnace company we usually call when we need furnace maintenance to check it out. He told us our heat exchanger in our furnace failed. I asked him […]
Richard, Can you please explain to me in basic terms how a gas furnace works? I have a standing pilot gas furnace if that helps you better. This question is closely related to my article on the Gas Furnace Sequence of Operation but each different type of gas furnace works differently. Therefore the sequence of […]
Troubleshooting Electronic Ignition Gas Furnace – Electronic ignition for gas furnaces is the modern way for furnaces to light the main burners on modern gas furnaces. Furnace technology has evolved from the standing pilot gas ignition systems that continue to be used today however there are less and less standing pilot furnaces used today. If your […]
Two-Stage Gas Furnaces 2-stage gas furnaces are ever increasing in popularity among HVAC manufactures of gas furnaces. The product lines are ever increasing from single stage gas furnaces to two stage gas furnace. The reasoning is that the two-stage gas furnaces are more efficient than the single-stage furnaces. This is according to tests performed using […]
Dangerous Cracked Heat Exchangers in Furnaces Everyone wants heat when old man winter arrives in the fall. Many times we take it for granted that when the temperature falls all we have to do is go to the thermostat and turn the heat on. Usually, this is not a problem. We turn the thermostat on […]
Trane 90 Plus High Efficiency Gas Furnace – This is a Trane High Efficiency gas furnace. It is also called a Trane 90 plus gas furnace because it offers efficiency ratings up to 90 percent plus. Gas or oil furnaces generally cannot achieve efficiency ratings over 95% because of impurities in the fuel including moisture. This […]
Automatic Vent Damper System | Gas Heat Flue Economizer The gas flue economizer or automatic vent damper closes off the top of this water heater after the burner finishes the heating process. The automatic flue damper traps heat in the furnace, boiler, or water heater and holds it in and around heat exchanger instead of […]
Gas Furnace Components | Ignition Controls Gas furnace ignition controls vary from furnace manufacturer to furnace manufacturer. Some are proprietary and some are from an engineering company which specializes in gas furnace ignition controls. Honeywell being a major manufacturer of controls for HVAC also makes several gas furnace ignition controls. Gas furnace ignition controls have […]