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TimVZ26, HVAC Technician
Category: HVAC
Satisfied Customers: 157
Experience:  6 Years exp. Nate Cert. in Air-to-Air Heat Pumps, Lots of Bryant/Carrier exp.
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luxaire 90 % furnace induced draft limit switch opens , 4 flashes

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luxaire 90 % furnace induced draft limit switch opens , 4 flashes , hi limit ok furnace is about 2 yrs old
make sure that the venting is clear and that the motor is also running at full speed, there also may be a drainage problem plugging the venting causing your problem
Customer: replied 6 years ago.
vent seems up to speed also if not furnace should shut down via air flow sw. and if drain was clogged . it takes an hr between failures will recheck .
ok, check it out because sometimes there will be a slight blockage and will let enough pressure through to make pressure switch but still not enough to vent properly. The other thing that may be is gas pressure may be overtired however I would more likely to expect a limit switch trip rather that a vent limit trip
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