Heater

Tiny
JODI09
  • MEMBER
  • 1998 ISUZU AMIGO
  • 4 CYL
  • 2WD
  • MANUAL
  • 160,000 MILES
Heater blows cold. If I shut the heat off for awhile, then cut it back on it blows warm for a minute, then turns to cold again
Friday, February 4th, 2011 AT 12:14 PM

1 Reply

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Here are possble causes.

Engine coolant temperature low. Check the thermostat operations.

Insufficient engine coolant. Top up if necessary.

Insufficient engine coolant circulation. Checked for clogged hoses.

Clogged heater core. Have heater core flushed.
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Monday, February 7th, 2011 AT 12:37 PM

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Step 1 - A heater cannot operate unless the engine is full of coolant/antifreeze. If coolant level is low check the system for leaks.

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