Q: Have no heat, I've took the thermostat out still no heat. Flushed the radiator couple times. Doesn't seem to be flowing n radiator

asked by on January 10, 2017

Here are all the things that i see wrong... No heat, blows out cold even with thermostat out. Im not really seeing flow of water from overflow to the radiator. Also ive tried flushing it a couple times with a garden hose the fluids in the radiator looks like really thick mud.

My car has 145000 miles.
My car has an automatic transmission.

The complete cooling system should be drained and fresh clean water put in with a good quality radiator flush put in. Run the engine for at least 30 minutes at 1000 rpms with the heater in the on position but on lowest blower position. Once ran then check to see if both of the heater hoses are warm. This indicates a good flow through heater core. Now let engine cool and drain and refill with fresh water again and start and run a few minutes then drain system, install a new thermostat and refill with 50/50 new coolant designed for the vehicle. Run and check the engine comes up to operating temperature and heater output is hot once engine warms up. You will not get good engine heat if engine does not heat up.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Radiator cap needs replacing.
If you have a white residue building up just below the cap and you have to add coolant frequently, this could be the issue. The cooling system and cap need to be pressure tested to ensure the system is not...
Car knocking after repair
Often, when concerns follow recent repairs, the most recent repairs must be taken into question first. Knocking engine noise is never a good sign, but not always a death sentence either. If the knock gets louder or faster with engine...
My blower motor is bad, should i replace the resistor also?
Hello. We do suggest that you replace the resistor at the same time. It may not be critical, but this will keep the system more uniform. The issue may even be related to the resistor. If you know that it...
Scirocco engine coolant light comes on in cold temperatures
Hi there: Sometimes this issues is caused by a faulty or loose electrical harness to the radiator temperature sensor on the VW. It will send a faulty error code and cause the symptoms you're experiencing. However, it could be a...
I had to get my coils and spark plugs change all 6. Mechanic said he had take out engine to get to back plugs. He did this and it
A mechanic would never remove the engine to change the spark plugs on 2004 Hyundai Santa Fe. The largest "part" of the engine that is removed to access and replace the sparks plugs is the plenum, which is simply part...
'09 Chevy Aveo transmission problems.
Hi there. The downshift solenoid could have failed in the transmission causing the transmission to not up shift. Also, the shifter cable could have came off the transmission making the vehicle only travel to second gear as it would be...
Heat not working in 2005 chrysler pacifica.
Hi there. It's possible that a failure in the thermostat (on the radiator) could cause a heater malfunction; but it would also impact the vehicle's overall cooling system and overheat your vehicle. It's more than likely that you're having an...
Possible causes of P0303 code 2009 Dodge Journey
Hi there - misfires (https://www.yourmechanic.com/article/how-can-problems-with-the-ignition-system-cause-misfiring_2) can be caused by worn spark plugs, failing coils, or injectors dumping too much (or no) fuel into a cylinder, causing a misfire. Yes, this could be a failing coil. Swap the cylinder #3 coil...
Theft light is not blinking in 99 Mercury Marquis car won't start fuel pump and crank shaft has been replaced also have a new batt
No cranking means no starter motor operation. If the problem is simply no starter motor operation the fault is typically quite limited. With a fully charged battery that passes a load test, and the immobilizer (security) system off - check...

Related articles

What Typically Causes the Heating or AC to Stop Working?
While both the heating and AC are connected - to an extent - within your car, they’re actually...
Symptoms of Bad or Failing Heater Hoses
Common signs include coolant leaking, hoses cracking, and engine overheating.
How Long Does a Water Pump Last?
The engine in your car produces a lot of heat, which means that the cooling system in your car will need...