In 20 years, I’ve changed out two gas valves. One was a warranty issues on brand new unit, the second was my own coworker sending 460V to a 24V gas valve. This part is one of the most reliable in the entire system.
Hell yeah Bill! Nice job. I had one from carrier, brand new with flame roll out, scratching my head. Found no wheel on the combustion blower smh, must have been built on Friday lol.
Missed the footage where you verified the gas pressure on the manifold side of the new gas valve and the combustion analysis and the leak check of the installation. All the "big picture" trade mark stuff.
Installed same unit a month ago. Spark but no ignition. Manifold pressure was .5" W.C. Not enough to lite off, hear or smell gas or light manualy with a lighter! Played with high and low pressure adjustment on gas valve and got it working. Commissioning of such unit's should always include checking/ adjustment of burner gas pressure and setting blower speeds for correct SP. Quality control is shit with most everything these days :(
We change out tons here in Alberta Canada. Our cold Winter is hard on units. If your inducer turns on and you have spark the only thing left is a bad gas valve or regulator if the unit has one. 9/10 times it’s a bad gas valve. Swap er out and BOOM! Fire in the hole. You’re 100% right to check the gas pressure on the outlet. If it’s 0.00 during a call for heat and it’s sparking that gas valve is toast. Good video man!
Hey Bill! I used to love doing work for the pubs. It seems to be the vibe of it being a happy place. The diagnostic work on the gas valve was on point. Next summer it will be the vsd, condensing environment when the compressors stop and the evap warms up, vsd is nicely chilled, bang. Nice to see you around, take care. Kind regards, South Africa
hey man, just started watching your vids, you really gotta start making more! Really enjoy your approach and how you talk through your diagnosis. Make more videos! even how you do your PM's lol! always like to learn/see new tricks. what do you do mostly? Im a refer tech for resturant service, going on my 2nd year in march. great videos man! keep up the good work.
Need to just add one step. Unless I’m mistaken on the new gas valves in my the package units. Check and make sure that the manifold adjustment screw was even set… other than that I’ve seen and have had valves that you turn the valve off and won’t turn back on, like the switch fails
20 plus years. I have changed out 3 gas valves. 1st one was a bran new Goodman Furnace I was shocked. Next one was a 750 horse power Cleaver -Brooks boiler at a Hospital they run all year around so that one was understandable . And the last one was a Lennox Rtu.
Carrier has been sending out a slew of bad parts, we have received 2 failed inducers and a failed gas valve in the last two weeks right out of the box. One of those inducers was for a 6 months old unit where the inducer fell apart.
maybe all the construction work filled the gas lines with debris, something like concrete/drywall/tile dust and it chooched the valve on first start or so.
Funny how the S/D is not ran thru the board like it should be on that Carrier. Middle of the right side of the (blue colored) board. Gas valve could have been clogged with dope. Doesn't take much. Stay safe and be well Bill.
Thanks for the video! I've had the same experience.....gas valves rarely malfunction. Just a thought...it's recommended you check the supply gas pressure for proper combustion.
Those gas valves are trash. Lennox used them a bunch. When it starts sparking hit the gas valve with a screwdriver handle and it will probably fire. I've replaced a bunch of them.
