Timsec 2Packs Patio Heater Thermocouple And Fd4 Dump Switch,, And Room Heater. Timsec Safety Flame Failure Thermocouple Sensor Tilt Switch Replacement Kit, will help you solve below problems: a. your heater can't be lit even the lighters are fine. b. your heaters thermocouple broken. 23.5" much Longer Thermocouple can be compatible with Most Brand Propane Gas Outdoor Heater, Garden Heater, Room Heater The Replacement Kit is Not universal parts, Please Check Dimensions and Installation way Carefully Before purchasing. Specifications: Item: FD4 Dump Switch Weak Current Tilt Dump Switch for gas R 10 m ohm Current Voltage: 250VAC/15A 125VAC/20A Flat Terminal Width: 0.19", 0.26"(4.8mm,6.5mm). Parts Numbers: FD4. Item: 23.5" Gas Patio Heater Thermocouple Thermocouple Wire Length: 23.5" (600mm) Thermocouple End: M8 x 1 Thread with Nuts on end Thermocouple Probe Diameter: 0.24"/ 0.3" (6mm/7.5mm). Flat Terminal Width: 0.19"(4.8mm) Package Included: 2Pcs x 23.5" Thermocouple 2Pcs x FD4 Dump Switch. [WIDE APPLICATION] - This gas heater Thermocouple and Dump Switch replacement part is suitable for propane, patio and thermoelectric gas heaters with thermoelectric safety room gas heater, outdoor patio heater and other Thermoelectric gas products. [FUNCTIONS] - The FD4 Tip over Switch will automatically stop the heater when the heater is tilted or dropped, which can prevent the occurrence of gas leakage when the fire is extinguished and the gas is still on, which is more secure. [SPECIFICATION] - The FD4 Dump safety Switch is for weak dump switches with gas R ? 10m?. and Thermocouple wire total length 23.5?(600mm) M8*1 Thread Ends and two 0.19"(4.8mm) width Flat Terminal. 23.5" much Longer Thermocouple can be compatible with Most Brand Propane Gas Outdoor Heater, Garden Heater, Room Heater [EASY INSTALLATION] - The probe is connected to the ignition device, the thermocouple is connected to the valve, and the other two ports are connected to the safety dumping switch, which does not require special tools and is fully compatible with the original components. [SATISFACTION GUARANTEE] - We stand by our quality commitment and will guarantee you 100% satisfaction of the Patio Heater Thermocouple and FD4 Dump Switch. Please do not hesitate to contact us if there is any question. We will do our best to solve the problem as soon as possible.