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The most likely reason would be because you also have the defroster turned on with your heater. The defroster causes the A/C compressor to kick on which helps remove extra moisture in the air keeping your windows from fogging. The A/C compressor is linked to a "kick up" that brings the RPMs up to keep your engine from stalling due to the extra load possibly causing a surge.
What else can I help you with?
Does it damage the engine to turn on the heater before the engine warms up fully?
NO, it will not damage the vehicle engine by turning the heater ON before the engine has warmed up fully.
How do you replace a heater return tube on a 2001 Dodge Intrepid se?
From the Dodge forums. Drain the coolant, disconnect the surge tank to heater pipe line, and the heater core to heater pipe line, remove the drivers side engine mount, and the starter, and unbolt the heater pipe from the engine-transmission bolt. Remove the clamp from the short hose at the thermostat housing, and pull the pipe out.
Heater starts to turn cold when at stop light - what causes that?
The #1 cause of cold air from the heater when the car is stopped, or the engine is idling, low engine coolant levels.
Why would cold air blow out when you turn on the heater?
engine not warm, low coolant, or stuck thermostat
Heater in dodge 5.7 hemi starts out warm then cools down when you turn blower on high?
If the engine is at the proper temperature and the coolant is full, you have a restricted heater core.
What does the fuel heater on your 1997 ford 7.3 diesel do?
You may be refering to the glow plugs. They help the engine turn on.
Volvo 850 1994 if you turn engine off heater fan motor will not cut off?
Check and change the relay
How do you fix the engine surge in your v6 1984 Ford Ranger 4x4?
Check your vacuum lines this usually the cause for a surge in engine speed when idling or running.
What is the less likely cause of an engine to hunt and surge at top no load speeds?
The price of pineapples in Hawaii is less likely to cause an engine to hunt or surge.
Can an electricity surge turn on a light?
Yes, an electricity surge can potentially turn on a light, especially if the surge causes a sudden influx of electricity that trips the circuit and powers the light. However, this can also pose a risk to the lightbulb and the electrical system, potentially causing damage. It is advisable to use surge protectors to prevent surges from damaging electronic devices.
Will a bad fuel pump cause engine surge on a lawn mower?
You probably have a dirty carburetor causing that surge.
When the car stops what causes the heater to go cold?
The heat for the interior of your car comes from the heated radiator coolant. When you are driving down the road the water pump circulates the heated engine coolant. If the engine slows and the water pump isn't real efficient you might get cooling in the heater. When you turn off the engine you aren't getting warm water pumped into the heater.
