No Heat

There's most likely air in the system. The dealer should be responsible for this.

 

yes the system can be hard to bleed. unfortunately, you have to go back again, and persist with them.

 

As the other fellows mentioned, must be some air trapped in the system

 

Just one thing to eliminate:

Try looking for a slow leak that could be creating an ever increasing air pocket. I'm thinking probably why it heats ok initially but fails later. If your windshield is sweating or fogging incessantly, could be your heater core if they pressure tested your system and busted your core instead (i hope not, a pain to fix as you have to remove the entire dash board).

If not check the lowest rubber hose from the radiator where they could have drained the coolant. It might not have been returned properly or damaged the hose. Look for drips carefully specially when car is warm, leak occurs more when the system is hot and pressurized. A single coolant colored drip (not caused by filling spill) in fittings or under driveway or undercarriage plastic is enough to indicate a leak.

 

Yes I think there could also be a leak in your system, introducing air into the pressurized sealed unit.

 

Have you hit any small animals or had a small front end collision lately? Even just a parking shunt could split the radiator or put a hairline crack in the cooling system somewhere - probably near the front.

Failing that, what's the condition of the oil in the car? Have a look at the inside of the oil cap - is there any mayonnaise type stuff there? I'm wondering if your cylinder head has gone.

 

there might be a diverter valve?

 

Does the level of coolant in the reservoir drop after a service ?

 

Find a steep hill or get pair of ramps, get the car to operating temperature put the car in inspection mode this will force the engine to run continuously, drive up the hill or ramps with the front been elevated and turn on the heater, stay there for 2-5 mins, this should help get the air to burp up. It works every time when i change my cars coolant.

 

This is good advise also!

Not sure if you can do it also with the Prius, this car is new to me. But in my previous cars when i do this, i start out with the radiator cap off with the engine cold and the front part on ramps (or pointing up my driveway) and wait until the engine starts getting warm. Then i turn heat to High and the fans full blast and watch the air bubble up the radiator hole. At full temp, i massage coolant hoses (with gloves) specially the top ones and those that has portions that arches up, until all air is out.

 

did you try ebay?

 

Check with autobeyours.com for advice and parts

 

I don't know this guys, but they might be worth a look. I just bookmarked this from one of the threads here in priuschat. If i remember right, that person needed to replace their battery and ordered a recycled one from this guys for about $1,200.00.

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