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Turn engine off Backflush the heater core. After repairs are complete, go to step 10. See SYMPTOM DIAGNOSIS under TROUBLE SHOOTING. On 3500 HD, Cab & Chassis, Sierra & Silverado: Inspect the temperature door operation. Does the heater inlet hose feel warm and the heater outlet hose feel cold? Go to step 10. (The air temperature around the hoses must be at least 85☏ (24 ☌). Check the temperature of the heater inlet and outlet hoses by feel. Turn the temperature control knob to the maximum hot position. Depress the mode control button until the LOWER position is displayed. On Avalanche, Escalade, Suburban, Tahoe & Yukon: Start the engine and allow to idle. After the repairs are complete, go to step 1 0. Inspect and repair the cowl, the recirculation door and the heater/vent module case for cold air leaks. Compare the recorded temperatures.Īre the temperatures similar? If so, go to next step. Record the temperature at the I/P center air outlet and the heater core outlet hose. Secure a thermometer to the heater core outlet hose. ![]() 1995 honda atv engine block heater install#Install a thermometer into the I/P center air outlet. Does the inlet hose feel warmer than the outlet hose? If so, go to step 7. Feel the temperature of the inlet and outlet hoses at the heater core. Does the engine reach a normal operating temperature? If so, go to next step. If not, go to TEST N: TOO COLD IN VEHICLE under SYMPTOM TESTS.Ģ. Were you sent here from Too Cold in Vehicle? If so, go to next step. WARNING: Avoid contact with moving parts and hot surfaces while working around a running engine in order to prevent physical injury.ġ. Make sure to have an emergency kit in your vehicle.Check your heater hoses and make sure they are not blocked and check where the hoses connect to ensure they are properly installed.You can use a block heater timer to prevent this. If you do not want to get up four hours before you need to leave in the morning, you can leave your car plugged in overnight but plugging it in for more than for hours does not provide additional benefits and will increase your electricity bill.Make sure the cord you use for plugging your car in is suitable for outdoor use and check it for damage. ![]()
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