How To Test Limit Switches
Вставка
- Опубліковано 26 сер 2024
- Need to know where your limit switches are for your furnace and what they do? Find out what to do if you have already purchased the part and it's still having the same issue! Need help? We've got you covered!
*Do NOT use a lighter to test parts if you are worried you will hurt yourself. Better safe than sorry! Use a heat gun!*
Great description and details. I work gas service for a utility company and often go out to many homes helping customers keep gas flowing for heat and just advised a customer on this part. In my down time I watch videos to keep my troubleshooting skills up . Looking forward to seeing other videos here
Thanks
I love her word usage, funzies, booties, EZ, smouge. Super cute!
This information saves lives :D. Great tips!! looking forward to the coil video
Thank you! We do our best to ensure we can help in any way.
Thank you for making this! I’m a newer tech and keep getting frustrated and confused what limit is tripping on calls, they all are closed but the control board keeps saying a limit switch is open after it runs for a bit. I was always told if there’s continuity then they’re good. Need to start bypass then one by one to see which one is tripping when it should not be!
My youtube isn't telling me when I have responses! So sorry for the late reply. Yes, even if it has continuity it can be bad, however, at times it can also mean the high limit is doing it's job and it's just low air flow. Companies like Carrier, or Lennox (although Lennox I've seen can make their manuals more detailed) only say LS on the wiring diagram. It's like...OK, which limit switch? At that point, it is so flipping tedious to have to trace back which one is actually the problem based off of the wiring chart, or just bypassing each one. I swear engineers don't have technicians in mind when they design units.
Liked video on how to check limit switch circuit
Great video
You're explaining tech in shirt sleeve English.
Beyond cool !
Thank you !
Thanks for coming by and leaving a comment! I'm glad that we could help.
This was awesome
What's the restriction on gas presure ? I thank you for your response 👌🙏🙌🫴🫵🫶
Nice video 👌🫵🫶🌻🌷🌸🌹💐🥀
Excellent instruction! thanks!
Good information, thanks
Thanks for the video
Thanks!
Great topic nice to see you
Hi again , What's the sign of over heating please👌🙏🙌
Thankz,,,sweety,,got my unit,,,😀😀😀😀😀
Thank you for video
Very informative. I have my inducer randomly starting up during AC season. I’ve jumped all the limit switches and it still happens. I’ve replaced the main board and it still happens. What the heck is telling my inducer to start up? Happens when I only have R and Y jumped too eliminating the t stat. Inducer never ran before during the summer.
Does it behave the same way in heating? Usually when you are bypassing limit switches, you need to bypass them on the control board itself. The control board should be flashing a code if it ever causes a failure. Normally when this occurs, it is from an open limit switch. How are you bypassing the limit switches? You mention it ONLY happens when you jump R to Y. So this does not occur when you jump R to G or R to W?
Very nice, thank you.
My furnace shut off during the cycle, but we lost 24v to the thermostat, then 10 sec. The power to the thermostat is back. Why?
There shouldn't be much in like that can intermittently break voltage to the thermostat. The most common culprit would be a bad wire nut, slightly broken wire, or overflow shut-off switch. You'll do best to actually check for the 24V at the furnace when it fails on the thermostat.
good info thanks i have the GHR26Q3-75-2 lennox limit light came on so i had and changed hi limit and roll ran for a day same thing happened roll not tripped check a-coils very clean new filter i have a broad on the way ? any thing other to check thanks james
Hi James! Sorry for the delayed response so if you have figured it out awesome! If not, we can look at a few ideas. When you say the limit light came on, what did your fault codes say exactly? Did it say 'High limit or Auxilary limit switch open?' Does it just say limit switch open? Does it stay on for a while and then shut off, or is it faulting immediately? Thanks!
Nice presentation. You probably didn't know it, but there was some kind of creepy and distant music that was fading in and out in the background that was very distracting. You might want to re-record this.
where can we get the jumper
👍👍
8:17 "You buy a double male for funzies, and then it's super EZ, but sometimes they don't work with big booties." Wow! Seriously!?!?!
🙃 That wasn't even intentional, but hey, I'll own it.
Safer than using FIRE would be to use a heat gun. They are more than capable of generating safe high heat.
Of course! Safety first. This was before I got my heat gun. 100% should always not play with fire.
What , if no coil exists. Just heater?
5:17 "Some of them are 7 inches. I've even seen some that are 11 inches... good man has those"... wow, 11 inches!!! That's a good man, indeed! I'm the 7-inch type.
looks like it was my broad
Was she messin with the thermostat 😂😂
Lol vash