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2003 Jeep Grand Cherokee - Loses Heat
Posted: Thu Apr 19, 2012 6:47 am
by Holly
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!!
Re: 03 Jeep G Cherokee Laredo - looses heat
Posted: Thu Apr 19, 2012 7:56 am
by ricmorin
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.
Re: 03 Jeep G Cherokee Laredo - looses heat
Posted: Thu Apr 19, 2012 8:48 am
by Pauls Automotive
Clear hoses....I've never thought of that.....you learn somethiong new every day.
Re: 03 Jeep G Cherokee Laredo - looses heat
Posted: Thu Apr 19, 2012 9:04 am
by steven kiser
Does it have automatic temp control?
Re: 03 Jeep G Cherokee Laredo - looses heat
Posted: Thu Apr 19, 2012 10:22 am
by ricmorin
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.