hi guys; well its gotten really cold again -20s again and the wind is brutal, about 3 weeks ago my furnace would not fire up after much trial and error and a lot of cursing and praying we figured out what was wrong, ice in the direct vent exhaust ( code 3) fixed this then got code 4, high limit switch, well there was none to be had so we watched a video and it said to bang it hard and it might reset, well it did and the furnace ran like a charm till last night (now my tractors are cold) ok i could not resist the gt referance, ha ha ha !!! i had ordered a new limit switch and had it handy and installed it but the furnace fan runs all the time and code 4, in one of the videos i saw them jump the high limit, so i did this and the furnace is running correctly, turning off and on and when in idle mode i have a green light, i am thinking that my new high limit switch (160-30) is fudged and like the last time one could be days away. i plan on leaving the limit jumped till the new one comes in but i worry about co2, gas and blowing the place up, this is a 1996 direct vent 80% mid furnace. i think im good but i have been wrong before, any thoughts thanks farmer john
Edited by farmer john, January 29, 2014 - 01:11 PM.