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Same here!!! Was 12 this morning and are supposed to have a high of maybe 40. Supposed to stay like this all week with back to 10 Sunday AM.

A snow plow finally went by about 3 o'clock yesterday, as seen in this screenshot from a surveillance camera- I had only seen one pickup truck go by since it snowed. I haven't been out to investigate today but the plow pushed a wall of snow up in the driveway so I might go out and shovel a little bit in case we need to get out. Not even supposed to get above freezing for a week.

With out that air controlled coolant valve connected, (in the open/no air position) from what I can follow on the diagram, you should always have full heat. If you are not, I suspect someone installed another valve that is off, it may be the valves on the engine block, or it may be something they installed to control heat themselves and will not be on the drawing.

wow, completely different then what I was expecting and very different from the Red Dot systems I am used to on other trucks. You can forget most of what I wrote! Sorry if I led you a stray. Without those diagrams you'd be really up a creek! It looks like an early attempt to make an "electronically controlled " temperature system where you set it where you want it it controls heat and AC. I have never seen one like that, and there are many things that could be wrong. Worse, I have never seen PARTS for a system like that, esp the CTC board and such. May be someone else here has more experience with that system, I have never come across it. I believe CTC is an acronym for constant temp control. It looks like it uses a thermostat, resistor and board a long with air pistons and that air valve to control the heat and A/C. I think if worse comes to worse, find a way to bypass most of it so you have heat, and install and air switch to the air coolant valve so you can turn the heat off. They may use the CTC system to control frost on the AC evaporator, so to make the A/C system work (without the present system) you may have to install a frost switch. If no one here can help, I'd write Red Dot and see if they can be of any help.

Yes Iv had the engine up to working temp.There is no rad shutters on this truck.Theres no air going to the heater tap to operate it.We got a short break in the rain this morning so I went out to get some pictures.I removed the dash panel covering the air con unit.in the pictures you can see the lower lever to change from cold to hot is connected to a resistor which is then connected to an air/electrical switch.The two pipes on the right are connected to air pistons to operate the air direction flaps,the pipe on the left is the air supply and the upright pipe behind the wires is connected to the heater tap.It doesnt matter how the levers are set no air goes to the heater tap.Im thinking its the air/electrical switch or the resistor thats faulty.The air supply and air direction flaps work perfectly.Id appreciate anybodys opinion.Thanks Paul

My guess is there is another valve (likely on the block) or a valve controlled by a control cable that is not opening. I could be wrong, but if bypassing that valve doesn't work, follow the control cable to the valve that regulates the heat. make sure it is moving. Then check the valves on the block and make sure they are in the open position.

That’s really wierd I don’t remember that slug ever working that hard lol thanks for that … bob

Excellent I changed mine over. Also it was electric and I was having electrical issues with starting . I couldn’t quite figure out… I pulled everything out . I just threw everything out and went air start.

I forgot to mention after I put all that other stuff in now I can’t get the heater to fit in between the sticks. I might have to do some trick maneuvers to fit it in. There might work on it a little later today.

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Looks great Bob... Paul

Oh I forgot to mention entire time I’ve been with her I was on layover runs then mostly night runs so I didn’t spend a whole lot of time with her ,,I was gone all night then slept all day while she was working , now we’re always together lol let’s see how long we can go without beating each other to death lol .. like wow man there’s a challenge

If you justran the truckup to temp and felt each side of the tap This would give a good indication ifthe tap is working or not Is there shutters on the radiator ? If there is, do theseworks If the water in the cooling system isn't getting warm it won't matter about the tap Personally I don't really ever have a need for a heater in a truck, sometimes on very rare occasions it does get chilly So first things first, water has to get hot Then the tap has to be on Then some air movement And presto, a warm cab Paul

You can also unplug the EECU and check for continuity across the terminals in the plug. If there is continuity, then it is shorted in the harness

I haven’t had much time to mess with it. Will probably start this coming weekend.

finally got a minute with this thing

Vlad, I presume a large part of your problems are getting a visa from Russia??? The pictures I posted when we got home was on the old Just Old Trucks website and that crashed an we lost everything. Those pictures were in a better timeline order and the topic was 9 pages long. I have lost Stephanie's email address, but I still have John Vanatta's, so he could forward hers to you. You would also have to add New Zealand as there is the big Richardson museum there. I was thinking about going back in about 2019, flying into Rockhampton or Brisbane, renting a car. There is a museum in Gatton, several private collectors in Dubbo, work my way south to Sydney and participate in the April Haulin of the Hume, stop at the Wall of Honor on the Hume (similiar to our Viet Nam memorial wall) which honors all of the drivers who lost their lives on the Hume HWY, do the Snowy River Hydro project, Then take the Indian Pacific train west across the Nullibor plain, do the gold mine in Kalgoorlie, and on into Perth. Contact Aussie Paul and he can probably help you find more museums and private collections to visit, as well as possibly a ride on the Haulin' of the Hume??? Have Paul send you a map of Australia with some of the stops highlighted.

I bought mine from Manders Diesel for $250 per "kit". The kit was the motor, tank, tank mounts and controls (start button and relay valve). I bought two "kits" and they came with the voltmeter and low pressure light/buzzer from the 1st generation of Volvo's Roadway had. All I had to add was the -20 air line and the -6 control lines. I bought 2 because I wanted spare part in case I had a problem, I found them so reliable, that I converted my other truck to air start. The one that was too short to add an air tank on the frame, got the Maxwell ESM for electric cranking.

Mine is also an Ingersoll rand it was $1,000 bucks exchange in 1995.. lol but I’m sure you can work with that one good luck

Good luck Paul. I really don’t have anything to add on this one…. Bob

Thanks for the replys.I will post a picture of the heater A/C controls as soon as I can.As our summers are not that warm A/C has only become popular since the EU mandated it for all new vehicles in the last 15 years or so.As a result Iv not much experance with it so decided to ask before just tearing it apart.I will bypass that tap and see if it gives any heat.The electrical switch does power up one side of the fusebox when the key is turned on so I think your spot on with that Geoff.Thanks again for all the replys.... Paul

Irish Paul, Just click on the big picture in the post. It will then open the Flicker album. The same as the pictures of Macungie that Otherdog has posted..