2006 325i Overheating Code p0597 "Thermostat heater control circuit open" - BMW 3-Series (E90 E92) Forum

pvano · 04-03-2011, 07:51 PM

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I have a 2006 bmw 325i 3.0L E90. Car has been overheating and got a code of P0597 Thermostat Heater control circuit open. I replaced the thermostat with a new aluminum Wahler unit. Just drove it for 10 miles and it overheated again. The lower radiator hose going into the thermostat is a lot cooler than the other hoses, so it looks like it's still not getting a signal to open the thermostat when it get warmed up. Anybody have a solution? Much appreciate it, it's
s driving me crazy...

06325ibeamer · 12-22-2011, 06:22 PM

Hey can u help me, my car is doing the same thing and i got the themostat replaced and still overheated like yours. What was the problem with yours???

04-03-2011, 07:51 PM	#1
pvano Registered Drives: 2006 325i Join Date: Nov 2010 Location: Los Angeles Posts: 1 iTrader: (0)	2006 325i Overheating Code p0597 "Thermostat heater control circuit open" Featured on BIMMERPOST.com I have a 2006 bmw 325i 3.0L E90. Car has been overheating and got a code of P0597 Thermostat Heater control circuit open. I replaced the thermostat with a new aluminum Wahler unit. Just drove it for 10 miles and it overheated again. The lower radiator hose going into the thermostat is a lot cooler than the other hoses, so it looks like it's still not getting a signal to open the thermostat when it get warmed up. Anybody have a solution? Much appreciate it, it's s driving me crazy...
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12-22-2011, 06:22 PM	#2
06325ibeamer Registered Drives: 06 325i Join Date: Dec 2011 Location: harrisonburg, va Posts: 1 iTrader: (0)	overheating Hey can u help me, my car is doing the same thing and i got the themostat replaced and still overheated like yours. What was the problem with yours???

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