hi guys, I have a small but frustrating problem, the furnace on our rental went out between Christmas and new years, called the repair guy and all he wanted to do was change the furnace, looked at it with his flash light and restarted the pilot light. cost me $145. the next day it was out again called another guy he only charge me $70 and told me it was an old furnace and needed replacing but didn't even restart it. I googled what the issues were and found out it was a thermocoupler issue, 5 min job and $3.99 part from home depot. all is well now and the furnace is humming away beautifully. now my problem is the only techs in my area I have no confidence in, both wanted to sell me $3500.00 furnaces instead of installing a 4 dollar part. my furnace in my house gave me issues last year and is starting again with the high limit kicking out, flashing 4. replaced the high limit switch and it runs all day at 70 but if I try to crank it to 74 it will trip, its a luxair furnace about 15 years old, now somewhere I saw where these did have an issue and the fix was to put a small guard or deflector beside the limit switch to offset direct heat. any thoughts or suggestions thanks john I just had another thought, since the tech changed out the high-low limits last year I have had this problem the furnace is a biggie 140,000 btu , the high-low limits are 160-30 could this be too low a limit for such a big furnace?
Edited by farmer john, January 10, 2015 - 08:00 AM.