I'll do my best to provide all details. This is with regard to a Miller gas furnace; we're using a honeywell digital thermostat (t3200). The symptoms are as follows: The thermo triggers the furnace to power up; I can hear the gas kick on and the flames start blowing, then the gas kicks off prematurely. The power stays on as the furnace "re-trys" this approx. 4 times; finally it just powers down. The fan never kicks on, producing no heat through the house. This happens intermittently. I suspected the thermostat, as the furnace seems to have all the power/gas that it needs. So, I replaced the thermostat. Now same problem. The furnace is only about 8 years old. We generally program the thermo to 72 degrees. Any ideas?
Clean the flame sensing rod in the furnace. It is dirty and can't sense flame, so it shuts the gas off in case it were just spraying unignited gas into the air.
Done. So far that seems to have done it. As it was intermittent, I'll be keeping an eye on it for the next 24 hours. Thanks a lot for the help.
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
DIY Home Improvement Forum
3.1M posts
319.5K members
Since 2003
A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! Helping You to Do It Yourself!