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  1. Bryant Plus 90 Furnace - Error Code 31 DOES NOT LIKE COVER

    HVAC
    THANK YOU in advance for looking at this thread & forgive my ignorance- Recently here in Missouri, we have had several weeks of teens to sub degree temperatures. My Bryant Plus 90 Furnace has started going through the "pre" cycle but then dies out with what appears through research to be a...
  2. Sourcing Heat Exchanger Cells for a Reasonable Price

    HVAC
    Greetings fellow DIYers, I'd like to replace all four heat exchanger cells (Carrier part number 79988-50) on a 100,000-BTU/hour Bryant 394GAD048100 gas furnace. I like the modularity of individually replaceable cells, but it seems everyone is asking per cell what a complete heat excahnger...
  3. Bryant BW1 Can't Remove Burners

    HVAC
    I can't get at four wire loops securing the cast iron ribbons to the chassis. The first figure is a zoom-in of what I'm dealing with. I've removed the manifold in the front, but I can see four wire loops in the back (drawn in magenta), and there's no way i can reach in there. The second...
  4. Bryant Furnace Reversed Polarity

    HVAC
    Hi, I have a Bryant 80+ furnace (with AC) and my board is continually flashing. The status code says reversed polarity. Can anyone help me figure out what is going on before I have to call a HVAC company. I have little experience with furnaces but am good with electricity. Thanks in advance!!
  5. Payne gas furnace limit switch cycling

    Appliances
    Greetings... I have a Payne Model 395BAW036095 that is operating normally when the house is up to temperature and the heater is only working to maintain that temperature. However, when the house is cold and the furnace is called upon to bring the temperature up from say 56 degrees to 68 or 70...
  6. Bryant HVAC Furnace DHUM mode stuck in "on"

    HVAC
    Help. Having so many issues here with dry air since the heat was turned on. The prior owner removed the DHUM wire so that all the moisture I put into the air gets blown outside. The wires to the thermostat don't exist so we can't control the settings that way. The Furnace type is Bryant 355CAV...
  7. Thermostat apparently blowing low voltage fuse

    HVAC
    I am in Florida. Please as if more info needed but I will start this generally. - Upstairs and downstairs units, identical. - Bryant tstats on both (TSTATBBNB001). - A/C and heat pump - Purchase Honeywell tstat (RTH221B) - Story begins: Downstairs tstat display blank. Ok, 1) Noticed Bryant...
  8. Bryant 330aav intermittent problem

    HVAC
    I have a Bryant Plus 80 model 330aav furnace and have been having intermittent problems for several months now. It started in the fall, where I would wake up in the morning and the house would be a little cold. I would check the tstat and see that the temp fell below what it was set to, and the...
  9. 10 yr old Bryant Furnace

    HVAC
    I have a problem with the Blower continuing to run to long after the burner cycles off. I have heard of limit switches that were not to costly to replace, but would like to know if this is the most likely problem, and where to locate them. This is an approx. 10 year old Bryant 93+ Forced Air...
  10. Carrier furnace with spark but no pilot

    HVAC
    I have a 1988 Carrier furnace model# 394GAZ0361OC. It was having problems on startup where the gas valve opened up and igniter started clicking but it was hit or miss on if it would light the pilot. I took the spark electrode out and cleaned it and along with the gas orifice. This did solve the...
  11. Intermittent Bryant plus 90 Start-Up Issue

    HVAC
    Bryant plus 90 MOdel 398AAZ... I run into a frustrating intermittent problem where my furnace has quit after any of the following scenarios: 1. When only inducer starts, then dies. System is locked up and I have to wait several minutes before turning the power off then back on again. 2. When...
  12. Bryant Plus 90 Problem

    HVAC
    I have a Bryant Plus 90 furnace propane that worked once since I turned it on a few days ago and hasn't since. The fan works and the thermostat works. I get code 31 whenever I attempt to start the furnace. The, for a lack of a better term, "little" blower motor comes on and the LED stays lit...
  13. Bryant Plus 90 398AAV -- Not Enough Heat

    HVAC
    My furnace isn't producing enough heat. Here is what I mean. When I take the temperate at the registers, I get an average of 85 degrees on the main level and 95 degress on the 2nd story. These readings were taken after the furnace had been running for about 8 minutes. I've timed the cycle as...
  14. New Bryant Gas Furnace - Fuse Keeps Blowing

    HVAC
    I have a Bryant Gas Furnace (Model 310AAV) that is less than a year old. There was a problem with the furnace not coming on and it was discovered that the 3 amp fuse on the control board was blown. A new fuse was installed, the furnace fired up, heat came on and ran for about 10 minutes, then...
  15. Bryant Packaged Unit Troubleshooting

    HVAC
    Hi all. I am needing some help with my Bryant 582A series packaged heat and air unit. The unit is about 8 years old and it will not heat. It was working yesterday, but my wife and I heard a loud noise come from the unit in the night and now, no heat. The unit will also not stop running and...
  16. Old Bryant box, what does this mean?

    Electrical
    Old Bryant panel in a townhouse built in 1976. There is no main breaker. :censored: There is this one 60Amp breaker that is marked "Main LTS". Which I'm guessing is main lights as that's what seem to go off when it is switched. But 60 amps? And the wiring in the panel appears big enough for...
  17. Bryant 340MAV - Control board just flashes

    HVAC
    I have a Bryant 340MAV furnace with a United Technologies HK42FZ009 control board. When the thermostat calls for heat, the blower comes on, but the burner doesn't and there is no heat. The inducer motor never comes on. The LED on the unit flashes steadily, but the AC polarity is correct. The...
  18. Bryant 355MAV blower dies after one or two cycles in high heat, resets to low heat

    HVAC
    The blower works fine in low heat and will transition into high heat. It will do a cycle or two in high heat, but then when it tries the next cycle of high heat, it fires up fine, the blower comes on for maybe 30 sec, then it dies and code 41 displays (blower failed to reach 250 rpm or blower...
  19. Bryant 355MAV furnace

    General DIY Discussions
    I have a 355 MAV high efficiency furnace. It was installed in 1995. When I run the diagnostic test the furnace goes through the test with no errors, including the blower fan going into low and high spped mod. For some reason when the furnace calls for heat everthing looks and sounds good except...
  20. Bryant 3 wire pilot won't hold

    HVAC
    I have a Bryant 376BAW036075 that the burners won't ignite. It is a 1989 vintage furnace. This is what is happening. 1. thermostat calls for heat 2. inducer motor comes on 3. ignitor starts to spark 4. pilot ignites and burns and then it extinguishes 5. ignitor sparks 6. pilot ignites and...
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