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The 1970 Series Uni-Couple's unique design allows for installation to virtually all pilot burners. The versatile zip nut may be pushed, pulled or threaded onto the thermocouple's rolled threads for proper positioning in every application. The stainless steel tip (longer life), extended cold junction (greater voltage output potential), copper tube (corrosion protection with low electrical resistance), and lock washer equipped coaxial connection (resists loosening due to vibration or changes in ambient temperature) make the Uni-Couple the single most versatile thermocouple available today
Features:
- Used with SmartValve™ Systems.
- Replaceable Igniter-Flame Rod Assembly (Q3400A).
- Integral keyed plug provides quick, convenient connection of igniter and sensor to SmartValve™.
- Q3450 has front or 20 degree right, left flame patterns.
- Natural and LP gas orifices available.
- Variety of target styles available.
- Variety of mounting brackets available.
Compatibility & Applications:
- Listed for Carrier HVAC equipment (model-specific compatibility is not provided in the listing details)
- Must only be used where the manufacturer specifies this exact part number: LH680534 (confirm by the unit's model/serial and the applicable service/parts documentation)
User Reviews & Q&A Summary:
- Reviews commonly describe:
- - Perfect/OEM fit and being the correct replacement part
- - Easy installation for those performing the repair
- - Keeping a spare flame sensor (and often an ignitor) on hand for quicker winter repairs (review-reported)
- - Positive feedback on shipping speed, packaging, and overall purchase experience
Maintenance & Troubleshooting:
- The provided sources do not include formal diagnostic procedures for this flame sensor
- Reviews reflect replacement as a practical service repair (OEM part swap), with users reporting successful replacement experiences and restored confidence in having the correct part on hand
Certifications & Compliance:
- Meets ARI 780/790 Standard
User Reviews & Q&A Summary:
- Common theme is "correct part" for the intended replacement, with users reporting it worked as expected after installation
- Review feedback frequently mentions straightforward installation for a direct replacement
- Value and fulfillment are recurring positives (good deal/price and fast shipping)
Product Highlights
36" Length 
20mV, 30mVSpecs
| Length (Inches): | 36" |
|---|---|
| Voltage: | 20mV 30mV |
Reviews
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