Ask Experts Questions for FREE Help !
Ask
    Paul Coletti's Avatar
    Paul Coletti Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jan 3, 2015, 11:51 AM
    Bryant 340MAV Fires and shuts down goes into code 34
    System cycles properly, Blower runs 90 seconds, gas valve opens, ignitor glows, gas ignites, nice Blue color, shuts down in 3-4 seconds, code 34 blinks on " ignition proving failure, furnace relights, does same thing and goes into Lockout. Tried re-setting Temp rollout safety switch. Could it be oxide buildup on flame sensor??

    Controller circuit board looks okay. 3 amp fuse is good. Should I call for service or can I clean the the flame sensor myself?
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
    Ultra Member
    		  
    #2

    Jan 3, 2015, 03:22 PM
    It not only could be, but in all probablilitiy is, oxide on the flame sensor. Remove the flame sensor & clean well with a Scotch Brite pad or very fine steel wool. Do not use any kind of sand paper. Re-install, try it, & let us know what happens.
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Beckett burner fires and shuts off after a few seconds [ 1 Answers ]

I bled the system, Oil burner starts and runs than shuts off. Push reset and cycle repeats. Flame looks good as well. What could be wrong?

Bryant 340MAV Blower Motor [ 0 Answers ]

I have a Bryant 340MAV that the blower motor when bad in. I had a technician come out and replace the motor. The new motor does not seem to blow as hard. The first tech I talked to on the phone said that the OEM motor is a 3 speed motor. I am not sure but I think the replacement motor is a single...

Bryant 340mav trouble codes [ 5 Answers ]

Bryant 340MAV giving trouble code 33. We replaced the filter - shut off the power for 30min to reset the code- worked for about 6 hrs. now it is showing code 33 again. Blower works, but heat won't kick on.

Bryant 340mav furnace? [ 1 Answers ]

Furnace will fire up and run about 15-20min and I get a burnt smell through the registers. The furnace then shuts itself down. If I shut off all power to the unit and then flick the igniter switch a couple of times, the unit will fire back up and do the same thing all over again. Any ideas?

Bryant 340MAV Code 33 [ 0 Answers ]

Hi, I noted an intermittent heat issue with this model. I replaced a very dirty air filter. Now I get code 33. It would seem as though I am locked out. How do I perform a manual reset on this unit? I tried pushing the button on the rollout, but it doesn't seem to depress (very far...

View more questions Search