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My Chevy S10 Heater Wont Work

A malfunctioning heater in your Chevy S-10 can make for a very long winter. If the weather is particularly cold, you may be tempted to replace the entire heating system, but there are some very simple fixes to try before taking such a drastic step.

Instructions

Check Antifreeze Levels

1

Open the S-10s hood.

2

Remove the cap on the antifreeze tank.

3

If the tank is empty, add antifreeze to the tank until reaching the fill line. A lack of antifreeze can cause the heater to malfunction as the heater coil is not properly cooled.

Check Radiator Hose

4

Open the S-10s hood.

5

Locate the radiator hose.

6

Examine the hose for any holes that could cause a coolant leak. If the radiator hose isnt totally visible, a sweet smelling odor, steam, or decreasing coolant levels over the period of just a few days are also indicators that the hose may be leaking coolant, which can cause the heater to malfunction.

Check the Thermostat

7

Open the S-10s hood.

8

Start the S-10. Make sure the engine is cold and has not been running recently before starting the truck.

9

Touch the upper portion of the radiator hose. If coolant is being delivered through the hose, even though the engine is not warm, this is a strong indicator that the thermostat is stuck in the open position and needs replacing. A malfunctioning thermostat will prevent the heater from working properly.