propex thermostat replacement again

[Doctor Foster]

Cheers Kev.

Gonna have one last go tommorow then order the propex one if all else fails. Perhaps mine is duff.

Still cant understand the resisitor

[Oldiebut goodie]

mechanical thermostats are just switches they require no power to make them work.
if you didn't connect it to anything it would switch on and off as the temp rose and fell past the set temp

That is why they were suggested and are more suited to the task in hand.

mine is a room thermostat and works perfectly well.
Sunvic is the name of it
like this one
http://www.sunvic.co.uk/tlx2000_series.htm" onclick="window.open(this.href);return false;

Maybe your wiring is in better nick and isn't suffering voltage drop? Even so your thermostat is running outside of it's design range - successfully.(more by luck than judgement?)

[Oldiebut goodie]

Are the Propex thermostats amount of heat controls as well as thermostats?
The Webasto thermostat also increases the pump rate as it is turned up ( it is not graduated with degrees on the dial ), is the Propex the same?

[kevtherev]

it's just a room thermostat, the propex does not depend on pumps.
Propex heats a room, until the bi metal strip bends enough to break the power supply.
If you took the time to look at the spec of the propex and sunvic they are almost identical i.e. 24v. DC

so no luck, just sought advice from heating engineers and countless others on here who have done exactly the same adaptation. Which is money saving.

I am not sure what that little component does Dr foster, I shall endeavour to find out for you.

[Oldiebut goodie]

it's just a room thermostat, the propex does not depend on pumps.

I know that - what I meant was does it control the amount of heat output by controlling the amount of fuel.
All the specs. of the various Propex heaters that I can find state that they are 12 volt or 24 volt models not 12 volt /24 volt combined models.
I'm all for using something else when the oem item is far overpriced compared to what can be obtained elsewhere ( I run a 24 volt Webasto from 12 volts using a Maplin 140W laptop dc/dc convertor)

[Doctor Foster]

[Doctor Foster]

Well I got it going in the end. Done a few tests on it and it seems to be working although have yet to do a thermometer test to check its correct at the dial. But Im happy for now

Thanks for everyones help and advice epecially yours Kev

[kevtherev]

cool... job jobbed.

[Doctor Foster]

I forgot to mention I didnt fit the resisitor but have kept it just in case!

[Doctor Foster]

Still working.

[kevtherev]

Still working.

Still glad