I have a Bryant model 310AAV024070AAJA that blinks code 33, and eventually code 13. The blower runs almost non-stop, even with the thermostat set to off. This leads me to believe that the blower motor is good. In addition, both head and AC modes will sometimes exhibit this behavior. In the past I have ignored it, and the AC would work again after a few days. Last winter, this same thing happened for the heat, and it returned to normal operation before an HVAC technician could be scheduled.
The times when the blower turns off may be the result of the 3 hour reset. When it does turn off, it often stays off for a few minutes or a few hours. Occasionally it turns back on after a minute or two. I have messed around with thermostat settings and have cycled power too many times to be sure what cause yields which result.
Code 33 says to check for 8 things. I put a minus next to the things that I have eliminated and a question mark next to the things I need help checking:
-Proper vent sizing
-Loose blower wheel
-Dirty filer or restricted duct system
?Defective blower motor or capacitor
?Defective switch or connections
?Inadequate combustion air supply (Flame Roll-out Switch open)
The vent is difficult to check, as I do not have a ladder tall enough to get on the roof (it's a rental). Since both the AC and heat sometimes behave similarly, this seems to be a likely culprit.
Can I rule out the "blower motor or capacitor" since the blower runs almost non-stop?
Which "switch or connection" is likely to be defective in this scenario?
Can I check the roll-out switch on my own?
Can I temporarily bypass any of these things as a test procedure? If I temporarily open the vent to the service room that the furnace is in, will that bypass the vent restriction checks? Can the unit operate normally with the front panel removed, or do I need to replace it for each test?
Code 33 says flame rollout switch and BVSS require manual reset. How do I reset them? The manual that I found (http://www.docs.hvacpartners.com/idc/groups/public/documents/techlit/ii310a-45-1.pdf) does not mention how to reset them.
Please let me know if any other information is required. It's getting cold at night, but I live alone and work nights, so it's not a big deal... yet.