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-   -   new thermostat but still no heat from heater any ideas (http://www.ptcruiserlinks.com/forum/tech-performance-forum/65091-new-thermostat-but-still-no-heat-heater-any-ideas.html)

chrissy 09 Nov 2017 01:45 pm

new thermostat but still no heat from heater any ideas
 
hi can anyone help have just put new thermostat in because there was no heat coming from heater but still no heat i have 2.2 crd 2004 i think it might be air lock have tried to bleed from the bleed screw on end of radiator but no water comes out any idea any one please

ptcruisersteve 09 Nov 2017 02:26 pm

Re: new thermostat but still no heat from heater any ideas
 
Quote:

Originally Posted by chrissy (Post 674902)
hi can anyone help have just put new thermostat in because there was no heat coming from heater but still no heat i have 2.2 crd 2004 i think it might be air lock have tried to bleed from the bleed screw on end of radiator but no water comes out any idea any one please

Have you tried burping the radiator. Just remove the radiator cap with the engine cold, start the engine, let the engine get to normal temperature reading where the thermostat opens up, after a few minutes where you can see the thermostat has open up, turn the engine off and refill to the top. Do not let it run too long as the coolant will start to come out at the top.

If you still have air in the coolant system after burping it I would suggest raising the front of the Pt Cruiser, leave the radiator cap off overnight and in the morning most of the air should be removed from the coolant system.

chrissy 10 Nov 2017 11:53 am

Re: new thermostat but still no heat from heater any ideas
 
Hi Steve thanks for reply have tried all that you said but still no heat the garage thinks it might be head gasket but engine runs fine no over heating no oil on dip stick oil filler cap all clean there is no heat getting to heater pipes at all about month ago i drained radiator to fix core plug heater was working before I drained it although not that hot when I refiled it there was no heat
regards Chris

Handy_Cruiser 10 Nov 2017 12:03 pm

Re: new thermostat but still no heat from heater any ideas
 
If the issue is just no heat from the heater but the gauge needle is reading about right in the middle when the engine is warm:

1. First make sure the air is bled out of the cooling system as Steve recommended.

2. ]If all is good, It may be a problem with the blend door or the controls. [EDITED] Go here for directions on how to check this.

http://www.ptcruiserlinks.com/forum/...tml#post675045

If not working correctly, you will need the service manual for further diagnostics. Here's a copy if you don't have one:

https://drive.google.com/file/d/0B9C...ew?usp=sharing

3. If this is not the problem, you may have a clogged heater core. To service this, you will need to take both heat hoses loose and back flush the heater core assuring good flow.

Of course, the issue could be other problems as well. But I believe these are the most likely based on what you have said. ;)

ptcruisersteve 10 Nov 2017 12:08 pm

Re: new thermostat but still no heat from heater any ideas
 
After you have driven the Pt Cruiser, letting the engine cool off, is the coolant level still at the top when you remove the radiator cap every time?

Heater core may be plugged or there's air in the engine coolant system. First thing we need to do is verify there is no air in the coolant system.

You want to do the basic diagnostics before jumping to replacing the heater core or taking the dashboard apart only to find out there is air getting into the engine coolant system.

What year is your Pt Cruiser and how many miles?

sanatanadharma 10 Nov 2017 01:08 pm

Re: new thermostat but still no heat from heater any ideas
 
Quote:

Originally Posted by Handy_Cruiser (Post 674984)
... The vacuum solenoid for the blend door is behind the glove box. It's usually silver and easy to identify. Just put your hand on it and see if you can feel it working when you change the temp control with the heater on and the engine running. You should feel and possibly hear the movement. ...

Respectfully, the vacuum canister is the actuator for the fresh air/ recirculation control. Vacuum holds the diverter door in recirculation position. When the car is off or the vacuum fails, a spring resets the fresh air/ recirc-door to fresh air position.

The temperature control (air-blend door) works by a direct cable mechanical connection.

All fresh or recirculated air flows first through the A/C evaporator (which cools and dries only when the A/C compressor is operating).
Then the air blend door (temperature control) diverts some or all of the air (that passed through the A/C evaporator) to flow through the heater core as well.

The engine coolant flows through the heater core whenever the motor is running. There is no water flow control.

chrissy 10 Nov 2017 01:41 pm

Re: new thermostat but still no heat from heater any ideas
 
Hi Steve its a 2.2 crd 2004

chrissy 10 Nov 2017 01:47 pm

Re: new thermostat but still no heat from heater any ideas
 
thanks for all info will try on sunday will let you know how I get on

Handy_Cruiser 10 Nov 2017 03:15 pm

Re: new thermostat but still no heat from heater any ideas
 
2 Attachment(s)
Quote:

Originally Posted by sanatanadharma (Post 674996)
Respectfully, the vacuum canister is the actuator for the fresh air/ recirculation control. Vacuum holds the diverter door in recirculation position. When the car is off or the vacuum fails, a spring resets the fresh air/ recirc-door to fresh air position.

The temperature control (air-blend door) works by a direct cable mechanical connection.

All fresh or recirculated air flows first through the A/C evaporator (which cools and dries only when the A/C compressor is operating).
Then the air blend door (temperature control) diverts some or all of the air (that passed through the A/C evaporator) to flow through the heater core as well.

The engine coolant flows through the heater core whenever the motor is running. There is no water flow control.

Hah!

You are right and I am wrong. And once again, I must defer to the humble wisdom of Sanatanadharma. :forgive-me:

I'd been going off a really nice Chilton diagram showing the vacuum solenoid behind the glove box as operating the blend door. Being the knucklehead I am, I had to go confirm Sanatanadharma's guidance on my own PT. And yep, the "mix door" lever (the one we want) is controlled by a cable and is located just left of of the center console on the drivers side. It's a 10-minute job to check it on my 2007 2nd Gen (2006 thru 2010) PT. But I need to assure it's the same on a 1st Gen (2001 thru 2005) PT before I post a corrected how-to.

As always, Sanatanadharma is a very valuable member here and I never take offense when he needs to set me straight. He is the man. :thumbs-up:

PS: Photos of how to check this on a 2nd Gen PT are attached.

ptcruisersteve 10 Nov 2017 04:37 pm

Re: new thermostat but still no heat from heater any ideas
 
Quote:

Originally Posted by Handy_Cruiser (Post 675010)
Hah!

You are right and I am wrong. And once again, I must defer to the humble wisdom of Sanatanadharma. :forgive-me:

I'd been going off a really nice Chilton diagram showing the vacuum solenoid behind the glove box as operating the blend door. Being the knucklehead I am, I had to go confirm Sanatanadharma's guidance on my own PT. And yep, the "mix door" lever (the one we want) is controlled by a cable and is located just left of of the center console on the drivers side. It's a 10-minute job to check it on my 2007 2nd Gen (2006 thru 2010) PT. But I need to assure it's the same on a 1st Gen (2001 thru 2005) PT before I post a corrected how-to.

As always, Sanatanadharma is a very valuable member here and I never take offense when he needs to set me straight. He is the man. :thumbs-up:

PS: Photos of how to check this on a 2nd Gen PT are attached.

This is why I had asked what year the Pt Cruiser was as there can be a difference between Pt Cruiser generations in post #5.


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