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How do I get the water heater to start - Cars & Trucks

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Run the car and turn the blower on usually

Posted on Apr 27, 2015


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1 Answer

Water discharge hose on heater core discharging water. why? Possibly a bad heater control valve?

T stats don't always work. Replace it again. New ones can be bad from the start.

Jul 04, 2015 | 2002 Chevrolet TrailBlazer

1 Answer

Over heating and heater stop working

If heater runs water in it so could be low on coolant.could be a water pump issue.could be air locked in heater.good luck.

May 26, 2014 | 2000 Chevrolet Blazer

1 Answer

Heater blows hot then starts cooling down

Sounds like a plugged heater core or weak water pump.
Take the heater hose loose from thermostat area and the other hose loose from water pump inlet,and reverse flush water from a water hose from the water pump heater hose,assuring that the hose end from the thermnostat outlet is pointed downward away toward the ground.
I always tie a loose WHITE rag around this end so I can see what debris is backflushed out.If very little debris,you probably have a weak water pump after all.
The backflush is a good thing though.

Oct 19, 2011 | 1999 Chevrolet Silverado 1500

1 Answer

I have no hot air coming out off my heater

You need to change the heater core nothing else will help. You could try charging the heater core with water from a garden hose> Shoot water to the heater in to the 2 hoses next to ur car battery. Make sure u dont shoot water in to ur engine the heater core is inside ur car not under the hood, u just have 2 hoses going under the hood. after u see clean water coming from the heater should start working better.

Feb 07, 2011 | 1999 Volkswagen Passat

1 Answer

After the heater has been running for roughly 15 min in the at 21 deg it starts blowing cold this a sensor problem or is the climate control at fault?

Several things to check! 1 coolant level in radiator, 2 water thermostat 3 water valve to the heater core,heater core plugged,water valve not getting vacumn from heater a/c controls. temperature blend door not closing all the way.

Sep 12, 2010 | 2000 Ford Focus

1 Answer

Car overheating, blows cold air out vents, changed engine,radiator,thermostat,water pump, and heater core

A couple of things to check because as you describe your symptoms you actually have 2 problems

1. No heat from vents.

Sounds like the heater water flow valve cable is kinked disconnected or the valve itself is stuck You will need to follow your heater core water supply lines to find the valve usually to the right of the center console in the ducting area / large plastic housing for heater and AC internal coils. If the valve works then there is a possibility that the heater core water supply lines have been bypassed on the engine side of the firewall with a coupling due to a leaking heater core. And l;astly the heater core could just be clogged. (quite rare!!)

As for the overheating engine after all of the work you have done.. Perform this simple test.

1. remove radiator cap
2. have someone else start the car
3. watch for water coming out of the open radiator cap area DURING start...
4. have person in the car rev engine gently 2 or 3 times. No need to exceed 2000 RPM. If water rapidly flows out of the radiator during engine revs.. you have some major engine issues.
If it passes all of these checks then the only thing left is improper hose connections on the engine side of the firewall and or a hydraulic water lock in the block that should clear itself by starting and stopping the engine many times with the radiator cap off.

Jan 27, 2010 | 1997 Pontiac Grand Am

2 Answers

My heater not working, i replaced thermostat and radiator hoses, had radiator flushed and rodded, and still no heat. What is wrong?

Too much blockage in heater hoses or heater core.
Bypass valve may be stuck on "bypass" .

1. Remove bypass "Tees", but don't discard.
Replace with straight-through hose fittings.
The core may start leaking under the water pressure since there is no bypass hose.

Once the heater starts working, put Tees back in place. You need bypass protection or the engine will overheat.

Sep 25, 2009 | 1996 Ford F150 Regular Cab

1 Answer

How did I get water in my 2001 Ford Taurus heater blower?

Hello, it sounds like your heater core has busted and leaking inside the car. The water in your blower may be coming from the heater care also. to be sure you can get a ethyl glycol(antifreeze) tester . Thank you

Feb 28, 2009 | 1999 Ford Taurus

2 Answers

Water leak

sounds like heater core is it wet in the front on the floor under dash check out or the heater valve could be leaking also

Jan 01, 2009 | 1998 Pontiac Bonneville

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