2003 Jeep Grand Cherokee - Loses Heat

Holly · Post by **Holly** » Thu Apr 19, 2012 6:47 am

Customer has complained of losing heat. Just turns cold on its own. Originally changed thermostat and backflushed radiator and heater core. Still same problem. Brought back in shop and with a littler more conversation with customer, changed blend door actuator under dash (old one not closing door all the way). Worked for 6 weeks, now back to same problem. Double checked actuator and it is working fine now. Any ideas would be great!!

ricmorin · Post by **ricmorin** » Thu Apr 19, 2012 7:56 am

You need to determine flow. I have a set of clear hoses in different sizes I install and watch coolant flow. Sounds like low flow. Once that is determined, next is to establish why. Possibilities: blocked core, blocked passage, worn pump impeller, air pocket, etc.

Pauls Automotive · Post by **Pauls Automotive** » Thu Apr 19, 2012 8:48 am

Clear hoses....I've never thought of that.....you learn somethiong new every day.

steven kiser · Post by **steven kiser** » Thu Apr 19, 2012 9:04 am

Does it have automatic temp control?

ricmorin · Post by **ricmorin** » Thu Apr 19, 2012 10:22 am

Pauls Automotive wrote:Clear hoses....I've never thought of that.....you learn somethiong new every day.

Yup. Go to the hardware store and they'll snip you off a foot of each. Cheap.

2003 Jeep Grand Cherokee - Loses Heat

2003 Jeep Grand Cherokee - Loses Heat

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