Question about Bryant 95 Afue Gas Furnace Evolution355cav Plus 95 Multipoise
We have had this furnace for about 4 years now and it has made this noise every since we bought it. We have had dial one heating and air come out every winter to look at it and try to fix this sound but they can never figure out what is making the noise. It usually doesn't make the sound for them and they leave thinking nothing is wrong. last June they even replaced the blower motor and it started making the sound again this winter.
Sounds to me like it is a spark ignition which clicks to light the gas and then drops out. This would be normal. If it is hot surface ignition, then the only thing I can think of that would make a noise on a call for heating would be the inducer motor (burner motor) making a noise on a cold start, then heats up from the combustion flue gas. Have someone pull the inducer, & move the squirrel cage position on the motors shaft slightly & see if that makes a difference.
Posted on Dec 06, 2013
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Posted on Jan 02, 2017
Hi, you have replaced the stat several times, and adjusted the anticipator so its not the stat.This is a split gas/elect unit, and working on these for many years and looking at some of the solutions given, they are right.You need to be looking at the Furnace fan control.Units of that age they do tend to stick open and run constantly.I doubt its the fan relay, maybe if you were in the cooling mode.Fan controls are not that expensive. You probably have a Honeywell 7" to 11" Probe, with the auto/manual button, with a temp dial to set you're on off temps. I would inspect the heat exchanger for any signs of cracks or bulging being its that old. If you find any, you are looking at carbon monoxided and should be thinking about an upgrade soon.Also flame roll out.I am thinking of you're safety is all.If you do have this type of fan control, there is a tab that has to be cut before you install for 24v. control.It comes set for 120v. and will burn out all of your 24v. componants.Those old Bryants will run for years. Good Luck!
Posted on Nov 14, 2009
If you do not see a bright light before the gas releases, your ignitor is probably out. If you disconnect, you should measure ohms from the two ignitor leads. If you do not measure any, it is open and will not work. You will usually see a mark of white on the ignitor. Another possibility is the circuit board may not be sending the required voltage to ignite the ignitor so you'll want to check that too.
Posted on Jan 11, 2010
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