I can tell you this. You see that small copper tube coming out of the control unit (the thingy with the On Off Pilot),,,,,,,,,well thats the Thermocouple tube and the pilot is located at the end of that tube inside the firebox where the Thermocouple is. Its (thermocouple) right above the pilot because the pilots flame and heat is what keeps it turned on. Soooooooo see where that little copper tube ends because right inside there is the thermocouple and thats where the pilot will be located just below. Some furnaces have a sight glass and top screw you can loosen to turn the glass and get in there to light the pilot. The gas has to be on and the On Off Pilot turned to PILOT and held down or depressed or turned against spring pressure AND HELD THERE as you light the pilot and then continue to hold it down or in the spring position for 15 seconds or so until the thermocouple heats up enough to keep the gas on. A weak thermocouple may fail to keep the gas on as it should i.e. it would turn off after you released it from the PILOT position. Some furnaces have a piezo push button that snaps when depressed and it creates a spark there at the pilot so theres no matches etc used and they may NOT have a window you can ever open to gain access MAYBE YOU HAVE A MANUALLY OPERATED ELECTRIC PIEZO IGNITER??? if so look for a little red button you push and it snaps.

PS I bet you can go online and download the manual and it will tell you what you have (piezo or match light) n how n where to light it

Ol John T in Indiana

 

 

Note: John posted this as a response and I thought it was soooo good that I added it to our RV Repair forum. Thank you John T!             pat

Tags: How to Light an RV Heater, Lighting a Travel Trailer Heater, RV Heater Problems

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Pat, Youre Welcome, and a Caveat is in order, however. Its only fairly olddddddddddd RV's that used a pilot flame with either a manual match type of lighting, while later ones had the electric piezo where you pushed a usually red button till she snapped and it created a spark at the pilot under the thermocouple but hey this is "Good OLD RV's" I guess. For years now furnaces and hot water heaters have electronic ignition and their more typical problems are circuit igniter boards or oxidized cable to card conenctors or bad electrodes (where spark occurs).

Keep up the good work and fun and informative web site for those of us who enjoy oldie but goodie campers.

Ol John T in Indiana
See John T's further to above about problems with slightly more "modern" rvs with electric piezo sparky making thingys that light them up. Thanks John T !

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