heater blower not working sometimes

[Keitht1958]

when i first enter car engine cold heater blower blows full speed but after 5mins heater blows intermittently and sometimes nothing usally a bit of groaning followed by no fan air

not sure if its blower motor or resistor

also when i search eBay for replacement motor it lists chassis number as     8v1,8vk or 8va,8vf  but my chassis number is  8v6ea.. so confused.

 

[Steve Q]

My advice would be to get a diagnostic check then you'll know exactly what part has failed.