Hi, I just went through this with my 1999 Plymouth Breeze, but just the opposite. First of all, the needle of the temp gauge was consistently running warmer and warmer, to the point I was afraid it was going to overheat. That ended up being the thermostat being stuck shut. That cost me $220.00., because of seals that had to be replaced, replace all the coolant, etc, new radiator cap, seals, etc., it ended up costing $220.00, plus lost PTO from work and not so happy employer, but what can you do.
If your car is not blowing any heat, don't forget your thermostat can be stuck open. Then you won't have heat. If you water pump is bad, trust me you'll know, you won't get a couple miles before you realize that all of the coolant is running out, the car is overheating, there also might be noise (I heard knocking, I thought the engine was shot, although it did stop shortly after restarting). I lost all of the coolant I just replace with the thermostat replacement. When I saw the results of the coolant running out now and the smoke coming from the grill, that's when I realized that there wasn't enough coolant left in the radiator (because you can't try and keep the car from overheating if you use the extra fan that the heater helps with the car overheating), if you don't have any coolant left in the radiator, you won't get heat.
I have about 97,000 miles on my car, so to date, I've replace the thermostat, the water pump, the timing belt, all kinds of camshaft seals, etc., etc. the total I paid was $220 for the thermostat, $548 for the replacement of the water pump and the timing belt (since they were there, they did for the price of the parts). They will quote more, much more, my first quote was $651, I told them I don't have it. Knowing I wasn't kidding they worked with me, quoting $509. Then they called, and there were seals, camshaft seal, etc. as there was oil leaking, adding another $50.
Apparently, you really do need to look at the mileage on the car, suggestions on the internet suggest that this car will need a timin belt anywhere at or near this mileage. And, whichever happens first, the water pump, thermostat, or whatever, the timing belt at this mileage is probably going to need to be replaced from what I've read about the car. In all, I've put in $759, I know I can't buy a new car for this, and it kills me to pay it, but this car is difficult to get to these problems, I guess from the people I've talked to, to get to the water pump and the timing chain. So, all in all, I've had the car for four year, never a problem, but the problems get deeper and more extensive, tomorrow, I'll love it again, but as of today... money gone, pissed off employer.. I'm not happy, but don't forget I've had for four year, no money.. If I maintain, It's good for another 100k, or I say a prayer. Hope this helps
water pump
Yes....from your radiator in the front, squeeze one of the thick hoses when the car is running....if there is pressure (it's hard to squeeze), then your water pump is working. If it's easy for you to squeeze it all the way, the water pump has failed.
Yes
NOT if your on a water supply dependent on electrical power for a water booster pump
No, the pump will continue to pump water and the heater will work from the thermostat setting keeping a constant temperature.
Water pump not circulating coolant? Heater core partially restricted?
Heaters are usually plumbed in after the filter. The pool filter/pump is what circulates the heated water. Ans: The heater will not work or fire if the pump is not running.
Low coolant? Heater core airbound, restricted, or plugged? Bad thermostat? Water pump not circulating coolant?
Those are rarely used in homes. However, if you have one, it would likely be in the basement or near the water heater and storage tank. Most home water heaters work by convection, but if you have an industrial coil type water heater, you'd need a pump.
I would change the thermostat first. If that dont work change water pump
No, the knock sensor helps the engine computer control ignition timing. The water pump pumps coolant through the engine, heater, and radiator.
Low coolant? Defective thermostat? Heater core plugged, restricted, or air bound Water pump not circulating coolant?