Bryant 355MAV blower dies after one or two cycles in high heat, resets to low heat
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 failed to communicate to variable speed furnace control). It resets itself and comes back on in low heat, beginning the process all over again (and making for a very long time to reach the set temp). Any ideas?
The system is a Bryant 355MAV furnace (installed 1997). Only major service to date has been a new ignitor and main board (about 4 or 5 years ago).
because this unit is variable speed I recommend a pro to check it out. it could be control board, wiring harness, vs module on end of blower motor, with out a tec-mate tool to properly check it out, it will be very hard to diagnose this though the use of this forum