Troubleshooting HVAC systems

This one discusses the methods you should use for troubleshooting HVAC systems

[I--I]

All jokes aside.... This is one of the best channels with good old fashion experience that solves very good situations👍

[jamesrogers]

This is the go to guy if you want to expand your hvac understanding. His videos and answers to questions have helped me confidently fix several systems that could have put me in the poor house if I wasn't successful. Thanks GFM.

[scottyrockblends]

Most educated HVAC tech i have ever learned from .i am also a hvac tech and you can never know enough .guys make sure when watching repair videos that the person who is showing you is actually doing it the right way .if your on this Channel then its the proper way ...grayfurnaceman your awesome keep on with your videos.

[avpvideodc]

Gary! Thank you, Thank you, Thank you. I never had a need to repair an oil furnace then I did! I watched one of your videos from over 6 years ago and it saved my bacon. I was either going to give up on the project completely or break down and call someone and hope that they were competent! Got everything working and it's all thanks to you!

[robertcherry]

Sequence of operation is key.Knowing what it is doing or not doing relative to how it is supposed to perform is important.It is generally a three step procedure: 1) Diagnosis, 2)Isolation, 3)Correction.That is define, locate, and fix the problem. And knowing how to read schematics and experience of how components operate (Theory of operation) go a long way too.

[jeffadams]

Love your videos I learned a lot thanks so much. You are my hero keep up the great work.

[josemontanez]

Mr gray THANK you for all you good video they help a lot you the best THANK you.

[williampagan]

Thank you for sharing your knowledge over the years and your unchanging methodical common sense approach in applying the knowledge and experiences gained over the are the man...You are the Gray furnace and God Bless

[shawnfleming]

Truly appreciate and value your lessons. Thank you!

[sanatanainfiniti]

Thanks for sharing your expereinced way if doing. It is similar to what they taught us at school, Sequence of operation, but with extra infos to check all the obvious possible problems first. Excited and impatient to get a job.

[markallan]

Very true video. Always start with the first item in the sequence of operation and progressively test each component thereforth. Its often that many cant see the forest through the trees. Also if the guy before you checked something...that doesnt mean its functioning correctly. I get a lot of really good input from all your videos. As a gasfitter sometimes i have issues diagnosing oil burning appliances and I recently had a real puzzling scenario with a used indirect fired oil construction heater I bought. Your video on beckett clean cut solenoids and danfoss pumps was really beneficial to troubleshooting the issue. Really appreciate your knowledge and expertise

[RichGTr]

Thank you Mr. Gray for sharing your wealth of knowledge! You are so correct about being methodical in troubleshooting.. Very Best Regards!

[wbrutu]

Thanks for support king a legend in deed 💁👑

[jkbrown]

Methodical is best and while slow at the start, things get faster as your mind and eyes get trained. And those you can "guess" using probabilities, they are brain training for when you hit a hard problem. Not to mention the guess may only be one problem on a system with several and lead to callbacks.

[jamesbuddy]

GM gary / this year replaced pressure switch put ii a transformer out of panic had a rusty fuse socket we believe may have been the isse cleaned and running got up this am houses at 63 turned on off a few time got a code couldn't retrieve it then it began to run did note that the pressure connectors and the transformers holder nts were not tight .they where retightening where would you begin to recheck unit lennox down draft GHR26Q3-75 thanks james

[daveylad]

Good sound advice. Thank you.
The times you try and be clever and skip being methodical and change an expensive part only to find the fault is still there and it turns out to be something simple....doesn’t half make you look a fool.

[Tony-bhsh]

I am having an issue with my pulse furnace g14. My purge blower is running while it is up to temperature set on the thermostat. Then times out and restarts again and again. It does this constantly. The furnace heats the house fine but the only time the purge blower stops is when it times out for a few seconds a restarts.

[damongold]

Hi Gary, thank you for your videos. i’m actually an electrician (25 years) and troubleshooting IS my thing. i also enjoy fixing devices at a component level (which is much harder now with integrated circuits and our disposable culture) my furnace is not working currently and now i have the basic working knowledge to get the heat back on! I have some questions for you regarding gas combination valves that your other video didn’t cover. the on/off selector on the valve slides left/right but also pushes in. since my evcon dgat056bdd has electrical ignition and a 24vac which allows the gas to flow. does pushing down the on/off selector manually start the flow of gas? i’m getting no errors flashing on the status light, when the furnace gets its call for heat, the furnace get to the point where the igniter glows and my multimeter registers 25.2vac at the combination valve and occasionally the furnace ignites, but recently it has not lit in days, i’m thinking it’s a old igniter which is not drawing the required amperage to allow the flow of gas or the combination valve is bad and not opening when it receives the voltage from the control board is there a way i can test the combination valve? should I press the red on/off selector?

[mrkrasker]

I have been servicing electronic and electro-mechanical equipment for over 50 years. In that time I have found that starting with the simplest faults like lack of power, blown fuse, is the unit even plugged in, which I have run into quite a few times even after another tech has looked at the job, I can solve 98% of the issues I encounter. I am a bit slower than other techs but my success rate is higher with less callbacks.

[SixTwoHemi]

I learned how to repair furnaces from Mr Gary “oil furnace repair” videos I’m very appreciative for his wisdom and very very very in depth knowledge sharing.