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lesterdarnell

lester ... 12/26/2012

2000 Mercury Grand Marquis LS 8 Cyl 4.6L

Body & Interior

1988 Lincoln,the heater heats on and off

The heater heats a while and how cold

1 Answer


Jimm

Jimm 12/29/2012

Several possibilities; incorrect coolant mixture (not at 50/50 anti-freeze and water mixture), faulty heater control valve, faulty / clogged heater core, faulty / clogged heater hoses, faulty heater blower motor, faulty blower relay or fuse.

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