Q: Heat not blowing as hot as it should be.
With the car at normal operating temperature, the heat is on the highest setting it will not blow as hot as it should. At higher rpms the heat blows a little hotter. Is this a clogged heater core? Thanks
My car has 88459miles.
My car has a manual transmission.
Recommended Services
| Heater is not working Inspection | $94.99 - $114.99 | Get a Quote |
A clogged heater core is a possibility. The other possibilities that should be considered are a faulty heater control valve, malfunctioning blend door(s) in the in-dash ventilation network, collapsed hoses, inadequate coolant, and trapped air in the cooling system. If the engine operating temperature is normal, the thermostat would not be implicated. The recommended service to identify the fault is a no heat diagnostic. At the conclusion of that diagnostic and inspection, the certified mechanic would explain the required repair and provide you with an estimate.
The statements expressed above are only for informational purposes and should be independently verified. Please see our
terms of service
for more details
Get an instant quote for your car
Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
What others are asking
Slow acceleration and gasping noise -1985 Chevrolet C10
Hello. There are multiple possibilities here. There could be a vacuum leak to the engine (which affects timing, mixture, etc.) all of which kick in when under a load (vs. idling). Also, check ignition timing, especially ignition advance mechanisms, for...
Car stalls while driving, and won't start up for 15-20 minutes.
Your car was built right on the cusp of the period when Honda products were transitioning to distributor-less ignition. If it is a model that had a distributor, then that is the first place I would look for trouble. The...
My car shuts off at 40mph and i have to restart it
Hi there: In many cases when a vehicle simply shuts off while under operation it is caused by a main relay that is failing or a distributor issue. Most professional mechanics will begin to trace this issue by determining if...
What is the "98H" modification consist of?
Hi and thanks for contacting Your Mechanic. The engine will burn the ultra-low, Low, and High sulfur content diesel at any time. The thing about the High sulfur diesel is that the lubricity of the fuel drops making the engine...
Hey. I'm looking to buy a used car that's good in the snow and that lasts a long time under 10 grand.
Although this is an answer that is forced to be biased, I would recommend the Lincoln Navigator. This vehicle is very luxurious and great in harsh weather conditions. You can purchase an older one for less than ten thousand dollars...
Transmission not shifting
Hi There, It sounds like you may have a faulty transmission speed sensor (https://www.yourmechanic.com/services/transmission-speed-sensor-replacement) that may be causing this to happen. The other possibility may be a clogged transmission fluid filter that could also be limiting the flow of the...
Every time I come to a complete stop and hit the gas my car shuts off
Hi There, It sounds like you may have a dirty or failing idle air control valve causing your engine idle to fluctuate. The idle air control valve (https://www.yourmechanic.com/services/idle-control-valve-replacement) is a small valve on the engine's intake system that reads the...
Temperature gauge spikes up after driving for about 5--10 minutes, then returns just as quick to normal.
Overheating can be caused by a number of things such as low coolant levels, a faulty thermostat (https://www.yourmechanic.com/services/thermostat-replacement), a clogged radiator (https://www.yourmechanic.com/services/radiator-replacement) or a failing coolant fan switch. As you may know the coolant fan switch (https://www.yourmechanic.com/services/cooling-fan-relay-replacement) helps to maintain...
Carburetor adjustment
Today's fuel injected vehicles have computers that control the adjustment of fuel flow into the motor via the throttle body or in some cases, directly to the fuel injectors. In this case, there would be no need to adjust anything...
Related articles
How to Buy a Good Quality Heater Blower Motor Resistor
Vehicles Vehicles that are equipped with a manual HVAC, or climate control, system utilize a blower motor resistor to control the speed of the heater blower. If you are driving a minivan or an SUV with a separate rear passenger...
Symptoms of a Bad or Failing AC Control Module
Common signs include inconsistent cooling, out-of-date software, and uneven air distribution, since the module controls the whole AC system.
How Long Does a Heater Control Valve Last?
Keeping Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements of the coolant system can lead to a...
Browse other content
Maintenance
Estimates
Cities