How to tighten the FSD bolt for Ooni Karu 12 Gas BurnerUpdated 7 months ago
###
If you experience the flame cutting out with your Ooni Karu 12 Gas Burner,
it's important to carefully follow the outlined steps in this article [(The
flame in my Ooni Karu 12 Gas Burner is cutting
out](https://support.ooni.com/en_us/the-flame-in-my-ooni-karu-12-gas-burner-
is-cutting-out.-what-should-i-do-ByJmnRdzs)) before proceeding with the
following instructions.
### Your gas burner has a built-in safety feature known as an FSD (Flame
Supervision Device). This mechanism automatically shuts off the gas supply if
the thermocouple fails to register a sufficiently high temperature.
###
### Over time, the FSD bolt connecting to the thermocouple might gradually
loosen. This loosening can potentially cause your flames to unexpectedly cut
out. Regularly checking and tightening the FSD bolt can help ensure the
consistent and safe operation of your oven.
### ** ⚠ BEFORE YOU BEGIN:**
---
* #### Switch off Ooni Karu 12 gas burner and disconnect from any gas source
* #### Ensure that Ooni Karu 12 gas burner is completely cool and remove the from oven
* #### Work on a clear surface in a low-dust workspace
* #### Gather tools required
* #### Torx allen key (supplied with the gas burner)
* #### 8mm (5/16") spanner or adjustable wrench
* #### 10mm (5/32") spanner or adjustable wrench
* #### Gently lay Ooni Karu 12 gas burner upside-down on a soft surface
### **⚠ WARNING:**
* #### Failure to follow all instructions could result in serious injury and/or property damage.
* #### Some parts may contain sharp edges. Wear protective gloves if necessary
* #### If you smell gas:
* #### Shut off the gas supply
* #### Extinguish any open flame
* #### If the smell persists, keep a safe distance and contact your local fire department
* #### Read and follow all safety instructions, assembly instructions and care instructions before attempting to assemble and cook.
**Step 1 -** **Position your gas burner**. Gently lay your Ooni Karu 12 gas
burner upside-down on a soft surface
**Step 2 -** **Remove cover. **Unscrew the 4 bolts using the torx allen key
and gently remove the panel to the side. Take care when removing the panel to
ensure you do not overstretch the sparker wire.
**Step 3 -** **Loosen the washer.** Using a 10mm (5/32") spanner or adjustable
wrench, loosen the washer. This will make tightening the FSD bolt so much
easier.
**Step 4 - Tighten the FSD bolt**. To secure a connection, use your hand to
tighten the bolt as much as you can in a clockwise position. Then use an 8mm
(5/16") spanner or adjustable wrench to tighten it a quarter turn more. Do not
over-tighten.
**Step 5 -** **Tighten the washer.** To keep the FSD bolt in place, use your
hand to tighten the washer as much as you can. Then use a 10mm (5/32") spanner
or adjustable wrench to tighten it a quarter turn more. Do not over-tighten.
**Step 6 -** **Reattach the panel.** Use the four bolts to secure the panel
back onto the gas burner.
**Step 7 - Fire up. **Insert the gas burner into the oven, check your setup
is correct, attach the regulator to the gas tank and ignite.
If the above advice hasn't worked, we can still help, please resume the next
steps in the main troubleshooting article: [The flame in my Ooni Karu 12 Gas
Burner is cutting out](https://support.ooni.com/en_us/the-flame-in-my-ooni-
karu-16-gas-burner-is-cutting-out.-what-should-i-do-B1Yz3COMs).