Jump to content
SAU Community

Recommended Posts

Just did a search and didnt find anyone with the same problem. (I hope that's not the case!).

Yesterday found my heater doesnt appear to work.. Fans come on though no heat... (going to try air con this afternoon).

Anyone seen this before?

I hope its something simple... (though it rarely is!).

Cheers.

Link to comment
https://www.sau.com.au/forums/topic/411214-heater-not-working-m35/
Share on other sites

What temp did you have it set to? 18 degrees won't work, it just blows outside air.

If the heater stops working you most probably have low coolant. It only takes a few cups to be missing for it to stop flowing through the heater circuit. Wait for it to cool down completely before checking it, then go through the Voodoo bleeding procedure, again and again.

Mine's the opposite!

If its set to 18deg on aircon it blows cold, but on anything else, it blows hot (even set to 18.5deg)!

Ditto on mine, only since my accident though. Im surprised the boss hasn't made you fix it yet :P

could be a few things. there is a motor that drives the temperature control, which opens/closes a valve to the heater core. and also down under the steering wheel, to the left, on the removeable panel is a small vent with a pipe from the AC. check to make sure thats operational. i believe there is a sensor in there.

also make sure the dash sensor for sunlight is plugged in and/or operational

i have spares of them all, if required

  • Thanks 1

could be a few things. there is a motor that drives the temperature control, which opens/closes a valve to the heater core. and also down under the steering wheel, to the left, on the removeable panel is a small vent with a pipe from the AC. check to make sure thats operational. i believe there is a sensor in there.

I know the one you're talking about, I'll have to check that out, I had that panel off to disconnect the VSS switch for my roadworthy inspection (Being able to alter your exhaust flow whilst driving is illegal *ugh*) so I may have missed that one

Edit: Took too long to type. lol. You guys beat me to it.

You need to find the in cabin temp sensor, I think it might be under the steering wheel where you can see a little vent in the lower cover. It has a rubber tube attached to it. If this is the sensor, perhaps it is dirty or the hose has come off?

It will blow hot air until the temp has been reached under the dash, this may take a while with the vents blowing air on your face. Or the sensor is shagged?

  • Thanks 1

damn... just had a look at everything.. got coolant spray on both sides of the radiator.. looks like im up for a new radiator... :(

Anyone got a part number/price?

Scotty i take it your wreck has one still? :)

Is this a common thing to fail? if so should prob get a new one..

Edited by Sage222

The top tanks are usually the first thing to go. Hot coolant and being made of plastic makes the brittle, and they crack. Either that or the seal around the top tank.

Bottom tank is usually ok, becuase its cool by the time it gets down there.

Rad shops can replace top tanks, but easier option is the wrecker one I guess.

A new replacement one isn't cheap, around $350 - $400.

I have a second hand one in the wreck for sale, and I may also get rid of my new stock one as it is too thin for the track. It's only a few months old... Let me know.

the good thing is, a leaky radiator will last for at least 3 months.

mine leaked for ages. it was only seeping

Probably not something you want to risk with summer just around the corner.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Have a look at that (shitty) pic I posted. You can see AN -4 braided line coming to a -4 to 1/8 BSPT adapter, into a 1/8 BSPT T piece. The Haltech pressure sender is screwed into the long arm of the sender and factory sender (pre your pic) into the T side. You can also see the cable tie holding the whole contraption in place. Is it better than mounting the sender direct to your engine fitting......yes because it removes that vibration as the engine revs out 50 times every lap and that factory sender is pretty big. Is it necessary for you......well I've got no idea, I just don't like something important failing twice so over-engineer it to the moon!
    • Yup. You can get creative and make a sort of "bracket" with cable ties. Put 2 around the sender with a third passing underneath them strapped down against the sender. Then that third one is able to be passed through some hole at right angles to the orientation of the sender. Or some variation on the theme. Yes.... ummm, with caveats? I mean, the sender is BSP and you would likely have AN stuff on the hose, so yes, there would be the adapter you mention. But the block end will either be 1/8 NPT if that thread is still OK in there, or you can drill and tap it out to 1/4 BSP or NPT and use appropriate adapter there. As it stands, your mention of 1/8 BSPT male seems... wrong for the 1/8 NPT female it has to go into. The hose will be better, because even with the bush, the mass of the sender will be "hanging" off a hard threaded connection and will add some stress/strain to that. It might fail in the future. The hose eliminates almost all such risk - but adds in several more threaded connections to leak from! It really should be tapered, but it looks very long in that photo with no taper visible. If you have it in hand you should be able to see if it tapered or not. There technically is no possibility of a mechanical seal with a parallel male in a parallel female, so it is hard to believe that it is parallel male, but weirder things have happened. Maybe it's meant to seat on some surface when screwed in on the original installation? Anyway, at that thread size, parallel in parallel, with tape and goop, will seal just fine.
    • How do you propose I cable tie this: To something securely? Is it really just a case of finding a couple of holes and ziptying it there so it never goes flying or starts dangling around, more or less? Then run a 1/8 BSP Female to [hose adapter of choice?/AN?] and then the opposing fitting at the bush-into-oil-block end? being the hose-into-realistically likely a 1/8 BSPT male) Is this going to provide any real benefit over using a stainless/steel 1/4 to 1/8 BSPT reducing bush? I am making the assumption the OEM sender is BSPT not BSPP/BSP
    • I fashioned a ramp out of a couple of pieces of 140x35 lumber, to get the bumper up slightly, and then one of these is what I use
    • I wouldn't worry about dissimilar metal corrosion, should you just buy/make a steel replacement. There will be thread tape and sealant compound between the metals. The few little spots where they touch each other will be deep inside the joint, unable to get wet. And the alloy block is much much larger than a small steel fitting, so there is plenty of "sacrificial" capacity there. Any bush you put in there will be dissimilar anyway. Either steel or brass. Maybe stainless. All of them are different to the other parts in the chain. But what I said above still applies.
×
×
  • Create New...