Hey,

 

As the temps have plummetted this week I've found that my car's heating is not exactly reliable. Most of the time it doesn't blow warm air regardless of the temp setting I put it on or whether it is in AUTO or ECON mode. Sometime it will only blow warm air when cruising above 60mph and reverts to cool air when stationary (ie waiting at a traffic light). And then, like this morning, it works properly as soon as the engine has reached operating temp. It's very frustrating and annoying.

 

For the record, my coolant level is spot on and bled propperly and as far as I can tell the heater matrix is also in good working order. The car is a 1990 JDM TT with a Series II heating ECU and control panel.

 

I have run a ConZult diagnostic on the AC system and everything seems to be in order.

 

If anyone could offer some insight or advice I'd much appreciate it.

 

Cheers,

 

Dan

Hi Dan. Thanks for all your help with my Zed.

 

ontaps.co.uk type this one in it works....LOL

 

I can install full central heating for your Zed....it will be corgi registered but will look crap........From £3,6000 plus vat...... :D

Wish mine was the heating in the car, unfortunately in the middle of an extension to the house, so no hot water, no heating and half the back of the house has been knocked down, lets just says its a bit chilly here!

 

On a serious note Danny, hope you get your car sorted.

 

Barry

I have run a ConZult diagnostic on the AC system and everything seems to be in order.

 

If anyone could offer some insight or advice I'd much appreciate it.

 

Cheers,

 

Dan

 

Does the ConZult do all the same tests as the built in diags?

Here:

http://www.ttzd.com/tech/autocctech.html

 

Sounds like a sensor problem or maybe an airlock in the system.

 

Chris.

Does the ConZult do all the same tests as the built in diags?

Here:

http://www.ttzd.com/tech/autocctech.html

 

Sounds like a sensor problem or maybe an airlock in the system.

 

Chris.

 

Yes - full diags are processed. Can also activate the various vent doors and alter the air mixture (temps) ... but "no cigar" (as they say).

 

I'll bleed the system (again) at the weekend and see if that helps. I did bleed the system a little while ago after changing the coolant but this heating problem has been happening for quite some time now.

 

Thanks for the feedback (both silly and serious ;))

Flush your matrix through , i had the same , flushed it through loads of brown crap came out and now i,ve got HEAT :hyper: :hyper:

Deffinately worth doing a flush Dan, certainly sounds like an air lock, or possibly a faulty thermostat

Deffinately worth doing a flush Dan, certainly sounds like an air lock, or possibly a faulty thermostat

 

Thanks for the suggestions - I'll give it a go this weekend or next week sometime.

 

Today I spent nearly three hours in stop-start traffic in freezing temps (both inside and outside the car). Wasn't a lot of fun, especially considering my rear tyres are about a bold as a billiard ball ... Couldn't even get up my own drive which is at the smallest of inclines.

 

Cheerio!

 

Dan

Hi Danny, just to confirm you have a problem somewhere. I was out and about yesterday Manchester > Heathrow and my JDM 1990 Series 1 was warm and toasty. Agree with suggestions above - plus maybe some contact cleaner and/or sensor check. Is your Series 11 heating ECU orig? If not, maybe the conversion is where a problem has started. Good luck - Gio

Hi Danny, just to confirm you have a problem somewhere. I was out and about yesterday Manchester > Heathrow and my JDM 1990 Series 1 was warm and toasty. Agree with suggestions above - plus maybe some contact cleaner and/or sensor check. Is your Series 11 heating ECU orig? If not, maybe the conversion is where a problem has started. Good luck - Gio

 

Hi Mike,

 

Long time no hear/see! Hope you are doing well and keeping out of trouble!

 

FYI - my Series II heating ECU has worked flawlessly for over two years now but I suppose all things go kaput at some point. I will attempt a flush of the system first (always go for the cheap and straight forward option first ;)) before starting to look at more complex solutions to the problem.

 

Thanks for the advice and speak to you soon (need to touch base with you on a couple of "items").

 

Cheerio!

 

Dan