In this video, Joshua Griffin goes through several reason your furnace may not be running or producing heat. He gives 6 things you can do if your furnace has stopped isn't turning on. He also gives a few tips at the end about safety and things you should do when operating a furnace in your home. As always, if you're not sure what you're doing, please call a professional. Your safety and money may be at risk when you DIY and HVAC system including a furnace.
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Chapters
0:00 Intro: Furnace has stopped working
0:23 Power Switch
1:09 Float switch/ drain issue
2:16 Out of gas
3:44 High Voltage Issue
4:15 Furnace issue requiring a professional repair
4:37 Poor Maintenance
5:23 Safety Tips
6:32 Outro
#hvac #furnace #heating

Is your furnace not working in this video? I Want to go over six reasons why your furnace may not be working? Please note that some of these things you might be able to take care of yourself, but some of these things you might want to call a pro. and if you stick around to the end of the video, I've got a couple tips that I want to give you about your furnace and your home to keep you safer, but let's dive into it. Six reasons your furnace may not be working. Number one: It never fails.

Every year we get at least a couple calls where folks have accidentally turned off the power to the furnace and a lot of furnaces have simply a light switch that controls the power to that furnace. You would not believe how many times I've seen those switches installed in a place where me, even as a pro might think that's a light switch and someone has gone through and turn that switch off, turning off the power to your furnace. A lot of those switches will have a red cover on them designating them to let you know that that's the master switch to the furnace, but some of them don't. Some of them, it's just it's a light switch someone's installed.

Maybe your kids turned it off, who knows. But if your furnace isn't working, let's start there. It might be just simply turning a switch on number two. Some furnaces today have float switches installed on them.

Because today's furnaces being higher efficiencies, they actually condense water and they have drains on them just like an air conditioner would. And because of that, a lot of furnaces will have float switches installed on them whether it's installed on your secondary drain pan, whether it's installed on the drain itself, or some other place, Maybe it's even on the condensate pump wherever it's located. If that switch opens because there's a problem with the drain or the pump, or something like that, it will kill power to the furnace. So I would just say, especially if you have a drain that's backed up, that's something you might be able to handle yourself.

You might be able to Simply grab a shop vac, throw it on the end of that drain, clear the drain, get it flowing again. We've even had customers with extremely cold temperatures where the drain was not installed in a manner keeping in mind that it could freeze, and we've had folks that it's literally Frozen on the end of the drain, it's backed up to the furnace and open that float switch. So clearing that drain, getting everything flowing again will make that float switch close and your furnace start working again. Number three: This kind of depends on what type of gas you have.

If you have LP or propane gas, I would make sure that your tank is full. We get at least a couple of those every year where folks, maybe they didn't realize that they even had propane gas that they needed to pay the utility bill. We've had some customers that knew they had it, but they thought they were on some sort of Auto replenishment where the gas company would know or at least check it from time to time. Some of these gas tanks have a sensor that can remotely tell them using cell phone data and all that telling the utility company hey, I'm getting low or I'm out.
Regardless of the situation, you may be out of gas and that's something you can check yourself. Now if you don't have propane, you could have have natural gas. In those cases, there's no tanks to check. you're not getting the gas delivered.

It's usually piped into the home from the utility company, but there's a gas meter there. and if you didn't pay your bill or your laid or whatever, they may actually turn off the gas valv going to your home and lock it out. So depending on what type of gas you have, that's something you can check. Make sure you've got gas turned on and that may get your furnace going again.

Please note though, if you have an older furnace, you may have a standing pilot. so simply getting the gas turned back onto it, you might want to get a pro in there. If you don't know, you might need to get your pilot relit or have that Pro get the furnace going again, resetting it, Whatever's got to be done once you get that gas turned back on Number Four: A high voltage issue. Maybe the breaker stripped? Maybe you have a an ATS switch if you have a backup generator at your house.

A lot of folks like for their heat to run off of that, and the problem is if there's a problem with the ATS switch, the automatic trans first switch on the generator. Some of them can be kind of wonky. some of them don't switch back properly. so if you have issues with the ATS switch, it could affect your heat.

Make sure that breaker's on, make sure that ATS switch is flipped on, and make sure you don't have a high voltage issue. Number Five: Maybe you actually have a problem with the furnace and you need to get a pro in there. Maybe the fan motor's failed, a gas valve's having an issue? Maybe there's some other issue that needs to be resolved. Limit switches can go bad.

All kinds of things can go wrong with furnaces, and it's time to get a pro in there, especially if one of my other tips did not take care of it. And finally, number six is: poor maintenance can cause a furnace to fail if that furnace has not been maintained. Even a dirty air filter causing low air flow across that heat exchanger can cause a furnace to turn off or at least short cycle dirty flame sensors, other components getting dirty. I Remember a lady a couple years ago that told me well Josh we're not from Virginia where we're from, we don't have to maintain things like you're describing and of course this was after I told them their problem was because of poor maintenance on their heating and air system.

But I promise you, regardless of where you live, you should be having that system maintained in some way, shape or form. And if you're not, there is a chance that you're putting yourself at risk of that system turning off, failing, not running on a cold winter night. And so I told you at the beginning of this video that I would give you a few tips at the end and that's the first tip I would give you is have that system maintained properly, have the flame sensor cleaned, have all the components cleaned up really good. And maybe even more important than even having the system maintained is having a professional check the Co levels in the home, making sure the heat exchanger and all of the other components.
as far as the inducer fan and all the components that control that gas. Getting it out of your house, having that system checked, making sure everything is safe is Paramount if you're going to be using a gas Appliance in your home, especially a furnace. And the second tip that I would give you in addition to that is make sure you have a carbon monoxide detector in your home if you have any sort of gas burning appliances in your home. I Would not go to sleep tonight without one.

I'll put a link down in the description of this video to one that I think would work well but I would recommend having one on every floor I Would maybe even go so far to say is having one in every bedroom. Carbon monoxide is the silent killer people go to sleep and never wake up again. So anyway, that's my six did I miss one? Do you have something that furnaces will stop working and it's a common culprit? I'd love to hear about that comment down in the comment section below. and if you like this video I Think you'll like this one even more.

It's where I Talk about a big problem with heat pump inverter systems that no one is talking about. Thanks for watching! Hit that subscribe button. We'll see you next time.

4 thoughts on “Furnace not working? 6 reasons why!”
  1. Avataaar/Circle Created with python_avatars Sam says:

    Here’s a problem that is somewhat unlikely to happen to homeowners but did happen to me. Thought as an hvac guy, you would appreciate this story.

    I was working in CT in the 80’s at an old factory built in the 30’s that used Propane as an ignition fuel for the oil fired boilers (oil was cheap then) and a tank above ground. The winter of 85 was bitter cold at Christmas and the boilers went out for some reason (don’t recall why)) and wouldn’t re-light. The tank was recently filled and I could hear the spark igniter to light the fuel oil. Called the propane company in the middle of the night. Although he was bit ticked off, he did tell me the problem. It was well below zero and not high enough to develop enough pressure for the ignitor. I had to get steam hoses on the tank to use what little steam I had left to warm the tank. Eventually, we were able to develop enough pressure to get us going again. Even though there was a natural gas pipeline nearby, the company was too cheap to tap in. The cost of lost production and other mechanical failures around the plant as a result of the cold more than paid for running a line into the plant. The igniters were switched to NG as were the burners as oil prices rose. Accountants don’t always have the best interests (ie knowledge) to make the best decisions. 20/20 hindsight isn’t always best.

  2. Avataaar/Circle Created with python_avatars C B says:

    Ha! The best tip was to make sure the light switch is in the on position. It is not even cold here yet ( west coast ) but I have already had to replace four different ignitors. One was a repeat from last year. If you do a winter start up and the furnace exhausts starts and stops try turning the lights off and start it again while looking through the access panel. The zirconia or hot igniters will glow brightly when working. If you don't see the glow through the access door check that guy out. I know Ruud uses a flat one and Trane uses that tube looking element. There are a few different types but they all work the same and most are held on by one screw and use only one or two wires. And I have never seen one over 50 dollars. Imported ones can cost less than 20.

  3. Avataaar/Circle Created with python_avatars MrMarty5555 says:

    Check batteries in the thermostat.

  4. Avataaar/Circle Created with python_avatars Dnell68 says:

    Auto replenishment 🤣🤣🤣🤣

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