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Low coolant level, or a plugged heater core.

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19y ago
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Q: What could be the problem if the heater stopped working and the fan just blows cold air in your 2002 Ford Focus?
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What do you do if the blower motor on a 2000 Ford Focus stopped working as it blew the 30 amp fuse but as soon as you replace the fuse it blows again?

Check that the pollen filter has been replaced. Check that the heater fan hasn't seized due to water logging after pollen filter becomes blocked. Check resistor is working (next to heater fan on firewall) Check relay is working correctly.


Could a water pump be going out if heater blows cold air at an idle changed thermostat wasnt the problem. this is a 2000 focus?

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