Over temperature sensor

Supposedly blinking ac indicates ambient air sensor needs replaced ?????? no it doesn't ! Why don't you do yourself a favor an take it to a qualified repair shop that knows how to diagnose it correctly . Hooking up a factory or professional scan tool an checking for code's is the first thing to do. The way to know if a sensor has a malfunction is by A stored DTC - diagnostic trouble code .
DTC Descriptors
DTC B0158 02: Outside Air Temperature Sensor Circuit Short to Ground
DTC B0158 05: Outside Air Temperature Sensor Circuit Short to Battery or Open
DTC B0163 02: Passenger Compartment Temp Sensor 1 Circuit Short to Ground
DTC B0163 05: Passenger Compartment Temp Sensor 1 Circuit Short to Battery or Open
DTC B0168 02: Passenger Compartment Temp Sensor 2 Circuit Short to Ground
DTC B0168 05: Passenger Compartment Temp Sensor 2 Circuit Short to Battery or Open
DTC B0173 02: Output Air Temperature Sensor 1 Circuit Short to Ground
DTC B0173 05: Output Air Temperature Sensor 1 Circuit Short to Battery or Open
DTC B0178 02: Output Air Temperature Sensor 2 Circuit Short to Ground
DTC B0178 05: Output Air Temperature Sensor 2 Circuit Short to Battery or Open
DTC B0509 02: Output Air Temperature Sensor 3 Circuit Short to Ground
DTC B0509 05: Output Air Temperature Sensor 3 Circuit Short to Battery or Open
DTC B0514 02: Output Air Temperature Sensor 4 Circuit Short to Ground
DTC B0514 05: Output Air Temperature Sensor 4 Circuit Short to Battery or Open
DTC B3578 02: Output Air Temperature Sensor 6 Circuit Short to Ground
DTC B3578 05: Output Air Temperature Sensor 6 Circuit Short to Battery or Open
DTC B3583 02: Output Air Temperature Sensor 7 Circuit Short to Ground
DTC B3583 05: Output Air Temperature Sensor 7 Circuit Short to Battery or Open

Manual or automatic climate control ?
Have you had the HVAC control panel checked for DTC'S - diagnostic trouble codes ?

Air Temperature Sensors
The air temperature sensors are a 2-wire negative temperature co-efficient thermistor. The vehicle uses the following air temperature sensors:
• Ambient Air Temperature Sensor
• Inside Air Temperature Sensor Assembly
• Upper Left Air Temperature Sensor
• Upper Right Air Temperature Sensor
• Lower Left Air Temperature Sensor
• Lower Right Air Temperature Sensor
A signal and a low-reference circuit enables the sensor to operate. As the air temperature surrounding the sensor increases, the sensor resistance decreases. The sensor signal voltage decreases as the resistance decreases. The sensor operates within a temperature range between -40°C (-40°F) to 101°C (215°F). The sensor signal varies between 0-5 volts.
The input of the duct air temperature sensors are different from the ambient and inside sensors. The HVAC control module converts the signal to a range between 0-255 counts. As the air temperature increases the count value will decrease.

• DTC B0174 Output Air Temperature Sensor (Upper Left) Circuit Range/Performance
• DTC B0179 Output Air Temperature Sensor 2 (Lower Left) Circuit Range/Performance
• B0414 is for the left air temperature actuator.
B0408 is for the left air temperature actuator.
DTC B0989 Output Air Temperature Lower Sensors Correlation
The HVAC control module monitors the upper left and upper right duct temperature sensors when the mode switch is in the VENT or BI-LEVEL positions. The HVAC control module monitors the lower left and lower right duct temperature sensors when the mode switch is in the DEFOG, FLOOR or FRONT DEFROST positions. The duct sensors are used to measure the temperature of the air exiting the ducts to help maintain a consistent cabin air temperature. These duct sensor inputs provide the HVAC control module a way to determine if the engine needs to be started to maintain a specific air temperature. If an upper duct sensor circuit failure is detected the HVAC module will not request an engine start to help cool the cabin. A lower duct sensor circuit failure will not prevent the engine from starting.
DTC B0990 Output Air Temperature Upper Sensors Correlation
Your best bet , take it to a qualified repair shop .

did you replace to top intake gasket you removed when you replaced the back spark plugs ,and do you torque it down right

This should help any further assistance please feel free to contact me.

WHIRLPOOL
Range/Stove/Oven Fault Codes Non Y-Line
NOTE: Not valid for Y line. If there is a Y near the end of your model number, do not use this chart.
Failure
Code Condition Check/Repair 4 Digit Failure Code F0 - E0 Analog to Digital Failure Disconnect for 30 seconds - if display re-appears - replace control F1 - E1 Safety flip flop Replace Electronic Range Control/Clock (ERC) F2 - E0 Shorted keypad Replace Electronic Range Control/Clock (ERC) F3 - E0 Oven temperature sensor or oven temperature sensor fuse opened Replace oven temperature sensor or fuse F3 - E1 Oven temperature sensor shorted Replace oven temperature sensor F3 - E2 Oven too hot Replace oven temperature sensor F3 - E3 Clean temp too hot Replace oven temperature sensor F5 - E0 F5 - E1 and E2 Check door/latch switch Replace component 2 Digit Failure Code F0 or F1 or F5 Failed transistor Replace Electronic Range Control/Clock (ERC) F2 - E0 Oven temp too high 1. Test operation of door lock on self-clean models
2. Test relay contact operation
3. High resistance in oven temperature sensor F3 Open oven temperature sensor or thermal fuse Replace oven temperature sensor or thermal fuse F4 Shorted oven temperature sensor Replace oven temperature sensor F6 Problem in time keeping circuit 1. Reset time and/or cooking operation
2. Check for proper ground F7 Stuck function switch or button on Electronic Range Control (ERC) Replace ERC (Electronic Range Control/Clock) F8 Failure Electronic Range Control (ERC) Replace ERC (Electronic Range Control/Clock) F9 Door lock circuit Check wiring and test operation of door lock switch WHIRLPOOL
Range/Stove Oven Fault Codes, Common
Failure
Code Condition Check/Repair Digit Failure Code2 F1 Analog to Digital Failure Disconnect for 30 seconds - if display reappears - replace control board F1 Safety flip flop Replace board F1 Shorted keypad Replace keypad F3 Oven temperature sensor opened Replace oven temperature sensor F2 Oven temperature sensor shorted Replace oven temperature sensor F3 Oven too hot Replace oven temperature sensor F3 Clean temp too hot Replace oven temperature sensor F5 Check door/latch switch Replace switch if defective 4 Digit Failure Code F1 - E1 Safety flip flop Replace board F2 - E0 Shorted keypad Replace keypad F3 - E0 Oven temperature sensor opened Replace oven temperature sensor F3 - E1 Oven temperature sensor shorted Replace oven temperature sensor F3 - E2 Oven too hot Replace oven temperature sensor F3 - E3 Clean temp too hot Replace oven temperature sensor F5 - E0 F5 - E1 and E2 Check door/latch switch Replace switch if defective

F2
During

BAKE Control senses oven
temperature above 615F-630F If actual over temperature condition occurred: Look for
welded relay contacts on bake or broil relays. If this happens, replace oven
control (also called clock or ERC).

If no over temperature condition
occurred: Look for a high resistance connection or any other cause of high
resistance in the oven temperature sensor circuit. Check sensor, sensor harness
and sensor harness connection at sensor and oven control. Replace sensor if
found defective.

Remember: Oven control (ERC) measures resistance
of sensor circuit , not actual oven temperature. F2
During
CLEAN Control senses oven temperature above 915F-930F
If actual over temperature condition occurred:
Look for welded relay contacts. If this happens, replace oven control (also
called clock or ERC).

If no over temperature condition occurred:
Look for a high resistance connection or any other cause of high resistance in
the oven temperature sensor circuit. Check sensor, sensor harness and sensor
harness connection at sensor and oven control. Replace sensor if found
defective. Check door lock switches.

Remember: Oven control (ERC)
measures resistance of sensor circuit , not actual oven
temperature.

160....O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 2)

P0161....O2 Sensor Heater Circuit (Bank 2 Sensor 2)

P0162....O2 Sensor Circuit Malfunction (Bank 2 Sensor 3)

P0163....O2 Sensor Circuit Low Voltage (Bank 2 Sensor 3)

P0164....O2 Sensor Circuit High Voltage (Bank 2 Sensor 3)

P0165....O2 Sensor Circuit Slow Response (Bank 2 Sensor 3)

P0166....O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 3)

P0167....O2 Sensor Heater Circuit (Bank 2 Sensor 3)

P0168....Fuel Temperature Too High

P0169....Incorrect Fuel Composition

P0170....Fuel Trim (Bank 1)

P0171....System too Lean (Bank 1)

P0172....System too Rich (Bank 1)

P0173....Fuel Trim Malfunction (Bank 2)

P0174....System too Lean (Bank 2)

P0175....System too Rich (Bank 2)

P0176....Fuel Composition Sensor Circuit

P0177....Fuel Composition Sensor Circuit Range/Performance

P0178....Fuel Composition Sensor Circuit Low Input

P0179....Fuel Composition Sensor Circuit High Input

P0180....Fuel Temperature Sensor A Circuit

P0181....Fuel Temperature Sensor A Circuit Range/Performance

P0182....Fuel Temperature Sensor A Circuit Low Input

P0183....Fuel Temperature Sensor A Circuit High Input

P0184....Fuel Temperature Sensor A Circuit Intermittent

P0185....Fuel Temperature Sensor B Circuit

P0186....Fuel Temperature Sensor B Circuit Range/Performance

P0187....Fuel Temperature Sensor B Circuit Low Input

P0188....Fuel Temperature Sensor B Circuit High Input

P0189....Fuel Temperature Sensor B Circuit Intermittent

P0190....Fuel Rail Pressure Sensor Circuit

P0191....Fuel Rail Pressure Sensor Circuit Range/Performance

P0192....Fuel Rail Pressure Sensor Circuit Low In put

P0193....Fuel Rail Pressure Sensor Circuit High Input

P0194....Fuel Rail Pressure Sensor Circuit Intermittent

P0195....Engine Oil Temperature Sensor

P0196....Engine Oil Temperature Sensor Range/Performance

4.2L Engine To Remove:

1. Disconnect the negative battery cable from the battery.
2. Drain the coolant from the engine.
3. Disconnect the engine coolant temperature (ECT) sensor connector. Engine coolant temperature sensor removal and installation
   
   
4. Remove the engine coolant temperature (ECT) sensor from the engine.

To Install:

1. Apply thread sealer P/N 12346004 or equivalent to the engine coolant temperature (ECT) sensor threads.
2. Install the engine coolant temperature (ECT) sensor into the engine. Torque the sensor to 12 ft-lb (16 Nm).
3. Connect the engine coolant temperature (ECT) sensor connector.
4. Refill the engine with coolant.
5. Connect the negative battery cable to the battery.

5.3L & 6.0L Engines To Remove:

1. Drain the coolant from the engine.
2. Disconnect the engine coolant temperature (ECT) sensor connector. Engine coolant temperature sensor removal and installation
   
   
3. Remove the engine coolant temperature (ECT) sensor from the left cylinder head.

To Install:

1. Apply thread sealer P/N 12346004 or equivalent to the engine coolant temperature (ECT) sensor threads.
2. Install the engine coolant temperature (ECT) sensor into the left cylinder head. Torque the sensor to 15 ft-lb (20 Nm).
3. Connect the engine coolant temperature (ECT) sensor connector.
4. Refill the engine with coolant.

A educated guess I would have to say there is a problem with HVAC control module ! electronics you know ! But that's not the way to do things ! There could be codes stored in the module. The Chevy dealer my have a reflash bulletin for this problem . Then can reflash , reprogram the control module ! The first place to start is checking for codes in the HVAC module.
The HVAC control module is a class 2 device that interfaces between the operator and the HVAC system to maintain air temperature and distribution settings. The battery positive voltage circuit provides power that the control module uses for keep alive memory (KAM). If the battery positive voltage circuit loses power, all HVAC DTCs and settings will be erased from KAM. The body control module (BCM), which is the vehicle mode master, provides a device on signal.
Air Temperature Sensors The air temperature sensors are a 2-wire negative temperature co-efficient thermistor. The vehicle uses the following air temperature sensors:
?€¢
Ambient Air Temperature Sensor

?€¢
Inside Air Temperature Sensor Assembly

?€¢
Inside Air Temperature Sensor Assembly-Auxiliary

?€¢
Upper Left Air Temperature Sensor

?€¢
Upper Right Air Temperature Sensor

?€¢
Lower Left Air Temperature Sensor

?€¢
Lower Right Air Temperature Sensor

?€¢
Upper Air Temperature Sensor-Auxiliary

?€¢
Lower Air Temperature Sensor-Auxiliary
A signal and low reference circuit enables the sensor to operate. As the air temperature surrounding the sensor increases, the sensor resistance decreases. The sensor signal voltage decreases as the resistance decreases. The sensor operates within a temperature range between -40?° to +101?°C (-40?° to +215?°F). The sensor signal varies between 0-5 volts.
The input of the duct air temperature sensors are different from the ambient and inside air temperature sensors. The HVAC control module converts the signal to a range between 0-255 counts. As the air temperature increases the count value will decrease.
If the HVAC control module or auxiliary HVAC control module detects a malfunctioning sensor, then the control module software will use a defaulted air temperature value. The default value for the ambient and inside air temperature sensors will be displayed on the scan tool. The default value for the duct air temperature sensors will not be displayed on the scan tool. The scan tool parameter for the duct air temperature sensors are the actual state of the signal circuit. The default action ensures that the HVAC system can adjust the inside air temperature near the desired temperature until the condition is corrected.
The ambient air temperature sensor mounts underhood and can be affected by city traffic, by idling, and by restarting a hot engine. Therefore, the HVAC control module filters the value of the ambient air temperature sensor for temperature display. The ambient air temperature value is updated under the following conditions: Or you can just buy a new control module an hope that it fixes it. $89.00 at www.partsgeek.com

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2 Failure
Code Condition Check/Repair F0 & F1 EOC (Electronic Oven Control) failure Replace F2 Oven too hot Check Bake function F3 Oven temperature sensor open Check oven temperature sensor, 1100 ohms F4 Oven temperature sensor shorted Replace component F5, 6, 7 EOC (Electronic Oven Control) failure Replace component F8 Lock switches Check or Replace component Version 3 Failure
Code Condition Check/Repair F0 & F1 EOC (Electronic Oven Control) failure Replace EOC (Electronic Oven Control) F2 Oven too hot Likely a bad oven temperature sensor (should read 1100 ohms) Possible bad EOC (Electronic Oven Control) F3 Oven temperature sensor open Replace oven temperature sensor F4 Oven temperature sensor shorted Replace oven temperature sensor F5 or F6 or F7 EOC (Electronic Oven Control) failure Replace EOC(Electronic Oven Control) Version 4 Failure
Code Condition Check/Repair F1 Circuit board defective Replace control board F2 1. The oven temp has risen above 665F and the door is not locked or
2. The temp has risen above 965F with the door locked 1. Check oven temp in mode that failure occurred. Replace EOC (Electronic Oven Control) if above limits
2. Check 8-pin connector. Check and replace oven temperature sensor if necessary F3 Oven temperature sensor is open (above 3000 ohms) Check resistance of oven temperature sensor, check for open wiring between oven temperature sensor and control F4 Oven temperature sensor is shorted (below 500 ohms) Check resistance of oven temperature sensor, check for shorted wiring between oven temperature sensor and control F5 Internal watchdog circuit has detected a failure Defective EOC (Electronic Oven Control) F6 Shorted buttons Check push buttons and dome switches on control F8 Logic interrupted (lock motor switch sequence) Check door lock switches and wiring

F3 - F4 Open oven temperature sensor (circuit) (over 2700 ohms) or, shorted oven temperature sensor. Could be a result of:
· contamination on terminals
· pinched wire in oven temperature sensor circuit
· cold solder joint on control. · Disconnect power to range and remove oven temperature sensor connector from control.
· Measure oven temperature sensor resistance at oven temperature sensor connector (take care not to damage terminals in block) - Should read 1100 ohms at room temperature (approx 72 degrees F).
· Measure each oven temperature sensor lead from connector block to ground. If shorted, look for pinched or cut wire in oven temperature sensor circuit.
· Check connector terminals - Look for deformed or corrosion on terminals. Repair or replace.
If all above is ok replace control.