This is the customer complaint. Let car idle with heater blower set at low,50 degrees,turn blower on high,ice cold air from ducts. Drive car,sit at light heat 50 degrees,start moving gets cold. This has been verified. He states that 3 other shops have changed the thermostat,no change.We checked heater hoses temp at core 120,at block 195, big drop in temps o both sides inlet and outlet at heater core. Disconnected heater hoses and back flushed heater core,plenty of flow...Vacuum sucked cooling system down refilled with coolant. Still no heat.
Disconnected blend door cable and manual moved it from hot to cold, still no heat?????????????????????????????????
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Car engine gets hot and doesn't overheat.