From Newsgroup: rec.autos.tech

2014 Jeep Compass overheats (red light) if it goes gradually uphill for
a long time, like driving away from the coast. On the return trip
downhill it doesn't happen.

Turning the heat on brings it down very fast. Is that just because of
where the sensor is, or is it really cooling the engine coolant?

Does all this point to the need for a radiator flush or what?
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From Newsgroup: rec.autos.tech

Tom Del Rosso wrote:

2014 Jeep Compass overheats (red light) if it goes gradually uphill for
a long time, like driving away from the coast. On the return trip
downhill it doesn't happen.

Turning the heat on brings it down very fast. Is that just because of
where the sensor is, or is it really cooling the engine coolant?

Does all this point to the need for a radiator flush or what?

Things to check. First one first:
Radiator fins clogged with dirt and debris.
Thermostat may not be opening all the way.
Radiator fan (or fans) may not be turning on.
Temp sensor (or sensors) may be going bad.
Hoses may be collapsing.
Cooling systems rarely clog up, unlike in the old days.
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From Newsgroup: rec.autos.tech

On 11/12/25 10:26, Paul in Houston TX wrote:

Tom Del Rosso wrote:

2014 Jeep Compass overheats (red light) if it goes gradually uphill for
a long time, like driving away from the coast. On the return trip
downhill it doesn't happen.

Turning the heat on brings it down very fast. Is that just because of
where the sensor is, or is it really cooling the engine coolant?

Does all this point to the need for a radiator flush or what?

Things to check. First one first:
Radiator fins clogged with dirt and debris.
Thermostat may not be opening all the way.

Maybe one of the easier fixes. It's amazing how far you can throw a malfunctioning thermostat when you really want to.

Radiator fan (or fans) may not be turning on.
Temp sensor (or sensors) may be going bad.
Hoses may be collapsing.
Cooling systems rarely clog up, unlike in the old days.

--
Cheers, Bev
"By the time they had diminished from 50 to 8, the other
dwarves began to suspect 'Hungry.'" -Gary Larson
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From Newsgroup: rec.autos.tech

On 11/12/2025 1:26 PM, Paul in Houston TX wrote:

Things to check.-a First one first:
Radiator fins clogged with dirt and debris.
Thermostat may not be opening all the way.
Radiator fan (or fans) may not be turning on.
Temp sensor (or sensors) may be going bad.
Hoses may be collapsing.
Cooling systems rarely clog up, unlike in the old days.

Thanks!

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From Newsgroup: rec.autos.tech

Paul in Houston TX wrote:

Tom Del Rosso wrote:

2014 Jeep Compass overheats (red light) if it goes gradually uphill
for a long time, like driving away from the coast. On the return trip
downhill it doesn't happen.

Turning the heat on brings it down very fast. Is that just because of
where the sensor is, or is it really cooling the engine coolant?

Does all this point to the need for a radiator flush or what?

Things to check. First one first:
Radiator fins clogged with dirt and debris.
Thermostat may not be opening all the way.
Radiator fan (or fans) may not be turning on.
Temp sensor (or sensors) may be going bad.
Hoses may be collapsing.
Cooling systems rarely clog up, unlike in the old days.

Thanks again. It was the water pump.
--
Defund the Thought Police


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From Newsgroup: rec.autos.tech

Tom Del Rosso wrote:

Paul in Houston TX wrote:

Tom Del Rosso wrote:

2014 Jeep Compass overheats (red light) if it goes gradually uphill
for a long time, like driving away from the coast. On the return trip
downhill it doesn't happen.

Turning the heat on brings it down very fast. Is that just because of
where the sensor is, or is it really cooling the engine coolant?

Does all this point to the need for a radiator flush or what?

Things to check. First one first:
Radiator fins clogged with dirt and debris.
Thermostat may not be opening all the way.
Radiator fan (or fans) may not be turning on.
Temp sensor (or sensors) may be going bad.
Hoses may be collapsing.
Cooling systems rarely clog up, unlike in the old days.

Thanks again. It was the water pump.

Tom, thank you for the update.
It's been so long since I've replaced a water pump that I had completely forgotten about that part.
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