Adding parking heater

Anders_H · Post by **Anders_H** » 13 Dec 2017, 11:07

Hi guys. Any of you happen to know how to connect a night heater/pre-heater/fuel-driven heater to the car’s ecc so the heater controls the car’s blower motor when getting hot?
Volvo Svc70 2000
Thanks

Post by **abscate** » 13 Dec 2017, 12:48

That sounds like a big coding problem - made difficult because I have never seen source code for the ECC in print/data form anywhere.

The best solution I can think of is to disconnect the blower motor and connect it to the parking heater, then reconnect to ECC to drive

Anders_H · Post by **Anders_H** » 13 Dec 2017, 13:31

Someone wrote
“The cable tree goes from the heater unit to the battery via a relay and a
fuse box and to the timer inside
the car - if you have such installed. Further - on my car only one cable is
connected to the ECC control unit,
the one above the radio, where you adjust the temperature etc. There are 3
plugs and in one of these plugs
a cable from the heater is connected. This cable control the fan in the
car!!” Further:
“The cable (on mine - the color schwartz/violet) from the external relay pin
30 that controls the fan has voltage supply
via a 5A or 25 A fuse on relay pin 87. This fuse is located as one of the 3
fuses in the Ebersbächer fuse box.
The sw/vi cable from the relay pin 30 is connected to the A2 plug on ECC
unit, in this plug it is connected to pin no. 2.
When connected this way the fan start to run as soon as the engine
temperature is around 30 - 40 celcius, the knops on the
ECC unit has nothing to do with this fan control.”

Post by **abscate** » 13 Dec 2017, 13:44

If you have manual climate control (MCC) the fan could be wired into the switch, but with electronic climate control the ECC control unit definitely controls the fan speed based on inputs from the selection switches, the fan speed, and the coolant temperature. In winter, the ECC won't even flow the fan until the coolant starts to warm up

This may have changed since I last observed it this morning...

LOB · Post by **LOB** » 13 Dec 2017, 14:59

Why not go original, OEM nbr; 3729845 (petrol)
Or...
In Sweden, at least northern Sweden, everyone has an electric heater for the interior and another heater connected to one of the cooling hoses heating the motor. The Volvo OEM heaters for the block is crap, not heating the coolant but heating the block like a ironing iron, very inefficient. Calix is is a swedish brand for electrical heaters. The heater coil isn't expensive, 70 USD maybe. In -10c/ 14 F I start my heaters 1-2 hours prior to departure. Maybe I've got this wrong and you also use electrical heaters in North America!?

Post by **abscate** » 13 Dec 2017, 15:09

We drive longer distances so in 5 minutes are cars are comfortable with the stock heaters - and we still have 25 minutes to work. Block heaters are used in very cold climates like -40C

LOB · Post by **LOB** » 13 Dec 2017, 16:02

Starting an engine in -20 F is wearing the motor as much as driving a warm engine 3000 miles according to some experts. Not having to scrap the windshield from ice every morning is also worth quite a lot! Whether commuting 10 min or 60 min doesn't matter. A heater is a really good investmemt and improvement if you live in a cold part of the country anyhow.

Post by **cn90** » 13 Dec 2017, 20:20

I used to have ablock heater in my former 1991 Volvo 240, it helps a bit during cold start when it is -30C.

Over the years, I have learned the best friend for winter is good synthetic oil. If you live in a very cold climate, consider using Synthetic 0W30 or something like that. Engine starts much easier and gets to operating temperature better.

Anders_H · Post by **Anders_H** » 14 Dec 2017, 00:41

LOB wrote: 13 Dec 2017, 14:59 Why not go original, OEM nbr; 3729845 (petrol)
Or...
In Sweden, at least northern Sweden, everyone has an electric heater for the interior and another heater connected to one of the cooling hoses heating the motor. The Volvo OEM heaters for the block is crap, not heating the coolant but heating the block like a ironing iron, very inefficient. Calix is is a swedish brand for electrical heaters. The heater coil isn't expensive, 70 USD maybe. In -10c/ 14 F I start my heaters 1-2 hours prior to departure. Maybe I've got this wrong and you also use electrical heaters in North America!?

But even if I go original (I thought that eberspacher also did some OE Volvo) how do I connect it to the ECC?