Teledyne Laars Flame Sense Rod, R0334800$6799
Teledyne Laars Flame Sense Rod, R0334800
$6799
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Quick overview
- Genuine Teledyne Laars part Factory flame sense rod R0334800.
- Proves the flame The control opens the gas valve only while this rod reports that the burner is actually lit.
- Fits LX and LT heaters Listed against Jandy Laars LX and LT pool heaters.
- Lights then drops out A heater that fires for a few seconds and shuts down is the classic flame sense failure.
- Sooting and oxide A rod coated in carbon or oxide loses the tiny sense current the control looks for.
- Cheap part, common fault It is one of the least expensive parts in the heater and one of the most frequent causes of nuisance lockouts.
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Product details
R0334800 is the Teledyne Laars flame sense rod for Jandy Laars LX and LT pool heaters. It is the genuine factory part.
How flame sensing works
Once the burner lights, the ignition control needs proof that there is actually a flame before it will keep the gas valve open. The sense rod supplies that proof: it sits in the flame and passes a very small rectified current back to the control. If the control cannot read that current, it shuts the gas within seconds, no matter how well the heater lit.
The symptom to look for
A heater that ignites cleanly and then drops out a few seconds later is almost always a sensing problem rather than an ignition problem. Carbon, oxide, a bent rod or a cracked ceramic insulator all cut the current the control is looking for. Cleaning helps a lightly coated rod; a pitted or cracked one gets replaced.
| Brand | Teledyne Laars |
|---|---|
| Manufacturer part number | R0334800 |
| UPC | 052337015783 |
| Type | Flame sense rod |
| Part type | Pool heater part |
| Fits | Jandy Laars LX and LT pool heaters |
| Shipping weight | 0.1 lb |
| Ships | Parcel |
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Questions and answers
What people ask about this product, answered by our pool techs.
What does a flame sense rod do?
It sits in the burner flame and carries a very small current back to the ignition control. That current is how the control knows a flame is present, and without it the gas valve closes.
My heater lights and then shuts off after a few seconds. Is this the part?
That pattern points straight at flame sensing. Try cleaning the rod first, and if the heater still drops out after a successful light, replace it.
Which heaters does it fit?
Jandy Laars LX and LT pool heaters.
Can I just clean the old one instead?
Light oxide can be cleaned off, and that often buys time. A rod that is pitted, bent or cracked at the insulator should be replaced, since a compromised insulator leaks the sense current to ground.
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