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the most common cause of this issue is the blower motor resistor pack is faulty,
M7 should be 20A fuse and is for the rear 12v power socket,
there is no fuse for the blower motor it is controlled directly by the TIPM (computerised fuse box ),
 

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Discussion Starter · #3 ·
Thanks. In August I had changed. The
resistor. No help. Heater blows on medium,
But not on high. So I changed it again, no help.
Engine warms normally, as per guage, but
Output temp is barely warm. . Can't get to
both heater core hoses.( was going to flush it)
Antifreeze level is normal. Temps are going to be 25_45 for the next 2 weeks.
going to try & find a shop that will change
The heater core. Next week.
Everyone happy vets day
 

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to flush the heater core you access the hoses under the hood at the bulkhead (rear of the engine bay,
if you replaced the resistor pack and there was no change it could be the blower control panel that is faulty,
 
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