Q: Engine coolant temperature on high and no heat inside

asked by on

The engine temperature gauge was showing high.And there was no heat inside after heat is put on.I took it to a local mechanic.He told the heater core may be clogged.He flushed it.There was still no heat.Then,my friend checked the radiator,reservoir coolant level, and it was low.We topped it up.After a drive we checked the hose going back to the radiator.When we pressed it,we couldn't find enough pressure in the hose.My friend suggested that there may be air inside the coolant system.Well after a few hot and cold cycles,the hose was having pressure and we were getting slight heat.But the engine temp is still high.It gets to even beyond the red mark and when idling during a ride it gets below the red mark but beyond the half way mark. Yesterday I drove the vehicle for almost two hours ie I haven't stopped the engine.Finally,I was getting real heat inside with engine temp still high.After 3 hrs of cooling I drove again.heat is again low inside and engine temp on high.This is where I stand

My car has 160000 miles.
My car has an automatic transmission.

Hi there:

Overheating problems can be caused by multiple component failures ranging from a heater core that is clogged (as the mechanic suggested), a bad thermostat or coolant leaks and water pump failure. However, one item often overlooked is the potential for air bubbles trapped in the coolant lines. This can and often does occur when coolant is low, and added; without priming the system as recommended by Honda. To know exactly what’s causing your overheating issue, you should contact a professional mobile mechanic to complete a car is overheating inspection; so they can determine why your Honda Odyssey is having these issues and recommend the right repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Engine coolant temperature on high and no heat inside

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

Get a quote

What others are asking

Q: Steering wheel goes right when the car is started

Hello. Your Toyota Venza is equipped with an electric rack and pinion. The rack and pinion is moved by the steering wheel, which moves the tires to the right and/or left. If the electric rack and pinion is faulty, or...

Q: Check engine light is on, giving error code P03344.

Your vehicle does not use a distributor cap or rotor to provide spark. Instead the ignition system is based on an individual "coil over plug" arrangement. Engine noise, of a rattling or metallic character, is a known accompaniment to Diagnostic...

Q: Oil light and battery light came on. Car turned off

Stalling at idle could be due to a faulty mass airflow sensor, faulty camshaft or crankshaft position sensors, worn spark plugs, wires or defective ignition coil(s), inadequate fuel delivery or pressure (clogged fuel filter, injectors, faulty fuel pump or pump...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.