I have a Goodman GMP 075-3 FURANCE,the blower jumps on and runs all day and sometimes it jumps on and off all while the A/C COMPRESS IS STILL Running. Same in winter. I changed out thermastat and filter. Its 17yrs old heats and cools great. BLOWER ASKS UP. WHAT TO TRY NEXT WITH LIMITED CASH

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Originally Posted by rosevelt46

I have a Goodman GMP 075-3 FURANCE,the blower jumps on and runs all day and sometimes it jumps on and off all while the A/C COMPRESS IS STILL RUNING. Same in winter. I changed out thermastat and filter. its 17yrs old heats and cools great. BLOWER ASKS UP. WHAT TO TRY NEXT WITH LIMITED CASH

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Sounds like the time delay relay for your blower motor is failing--could be loose wire connections.