Not sure if this will still apply to anyone, but I've just completed a patch on the Trane XE70 furnace. I'd been having intermittent problems described in the previous threads: [url]https://www.doityourself.com/forum/gas-oil-home-heating-furnaces/480082-trane-xe70-furnace-does-not-light.html[/url] [url]https://www.doityourself.com/forum/gas-oil-home-heating-furnaces/322301-trane-xe70-furnace-doesnt-light.html[/url] [url]https://www.doityourself.com/forum/gas-oil-home-heating-furnaces/591289-trane-xe70-flame-sensor-removal-cleaning-replacement.html[/url] Basically, the igniter ticks, about once per second, repetitively, with no action. In the past, I had discovered that wiggling the 5-pin connector on top of the gas valve would open the valve and get my furnace working. I have tried recrimping the three black wires with no success. Removed the female connector and cleaning the pins and slots with no success. Cleaned the igniter and flame sensor, no success. Finally caught on to this forum, and saw that others had isolated the problem to the actual internal connections of the pins (I think thats right). Parts are hard to come by, it seems, so I wanted to leave my solution to help others trying to keep their 30+ year old unit running! Nothing fancy, but as other members had mentioned, a screw driver forcing the 5-pin a certain direction kept the fire burning. I used an old prong for a wall outlet from a lamp plug I had disassembled and replaced awhile back. It slides nicely next to the ends of the 5-pin connector. For me, placing it on the left hand side of the connector, while looking at the furnace has resulted in regular and predictable furnace function. Use your best judgement... turn off the power and gas while you're working and all that. Hope that helps someone. I was thrilled to find others with the same issue I was dealing with for years.

Hey folks, I was wondering if anyone could offer any advice. This morning I went to light my pilot light. I pressed the blue knob you see below to the "pilot" position, and then got the pilot lit. Unfortunately, I let go of the knob too soon, and the pilot went out. I turned it back to pilot after switching it off, but the pilot would not light after that. I have tried probably a dozen times since then, but I am never able to get it to light. I waited a few hours in between one of the attempts, but this made no difference. Could I have messed things up earlier somehow? I turned the knob past the off position that first time, could it have somehow completely shut off the gas to the furnace? I've read there are shut off valves - but I'm unsure where mine is, and I didn't touch anything but the blue knob. Attached are a couple of pictures - the first is a picture of what it looks like above the blue knob (the little arrow indicates where I light the pilot). The second picture shows the blue knob I turn to light the pilot. Thanks in advance for any advice! [img]https://cimg9.ibsrv.net/gimg/www.doityourselft.com-vbulletin/832x624/heater1_215ac5aa008797f598095bd39723d9a7b17b3e2e.jpg[/img] This is what the furnace looks like under the grill, where I light the pilot. [img]https://cimg6.ibsrv.net/gimg/www.doityourselft.com-vbulletin/1632x1224/heater_knob_8727dad528efff58baa760dc08089714dae535f5.jpg[/img] This is the blue knob I twist to light the pilot.