P38A Prog question.

Flossie · Jan 18, 2023

When I've used the prog button in the last cold snap I was pleased to see that it did what it was supposed to, heater fan to full, heated front and rear screens come on and heated seats too(iirc).
This morning, up at 5am, and the prog button lights up but nothing happens BUT my book symbol is displayed, this isn't unusual and it disappears once the cab warms up and the digits slowly reappear, intending to do the Rippon repair when the weather warms up a bit.
So the question- does the book symbol showing stop the prog feature from working?
In the first cold snap I can't recall if the book was up or not.

Jon Dor · Jan 18, 2023

On my 4.6 Thor P38, the "Prog" function still works, despite the "book" displaying on mine.
Hope that's helpful...

Flossie · Jan 18, 2023

Bugger...

kermit_rr · Jan 18, 2023

Maybe bring it inside, warm it up? It will get rid of any damp in there too. Does it do nothing ie screens don't heat?

pete12345 · Jan 18, 2023

+1 still works even with book symbol

Datatek · Jan 18, 2023

+2 works with the book symbol.

Flossie · Jan 18, 2023

Bugger and thrice bugger

.
The heated rear screen worked with prog OFF but not the front.
I'll have a quick look for any popped fuses, before it goes dark or I get too cold

Flossie · Jan 18, 2023

kermit_rr said:
Maybe bring it inside, warm it up? It will get rid of any damp in there too. Does it do nothing ie screens don't heat?

Front screen, fan speed and maybe, probably the heated seats didn't work. When I realised nowt was happening I turned off prog and tried the heated screens, front didn't work but the rear was, unsure if that rear screen was working during the prog session or just when I pressed the hrw button.
I was very happy with the prog feature but now I am sad

.

Flossie · Jan 18, 2023

Fuses all good. My next plan is to feel if the relays are clicking when the hfw button is pressed. I'll do that tomorrow when my helper is available.
I'll also see if the nanocom can make the screen work tomorrow.

Datatek · Jan 18, 2023

Flossie said:
Fuses all good. My next plan is to feel if the relays are clicking when the hfw button is pressed. I'll do that tomorrow when my helper is available.
I'll also see if the nanocom can make the screen work tomorrow.

Heated wind screens regularly fail, sometimes it's just the connections in the plenum corroded. The fans not going to full speed is more of an indication of the problem. Look for blueing of the relay pins for the fan relays.

Flossie · Jan 18, 2023

I did pull them out, should have mentioned that, shiny and clean.

kermit_rr · Jan 18, 2023

Have to ask, how do you know the heated screen isn't working? Could just be the bulb? If it's condensation on the inside it can take ages to shift!
I notice when it's on, the elephants twinkle slightly when the sun catches them

Grrrrrr · Jan 18, 2023

Flossie said:
When I've used the prog button in the last cold snap I was pleased to see that it did what it was supposed to, heater fan to full, heated front and rear screens come on and heated seats too(iirc).
This morning, up at 5am, and the prog button lights up but nothing happens BUT my book symbol is displayed, this isn't unusual and it disappears once the cab warms up and the digits slowly reappear, intending to do the Rippon repair when the weather warms up a bit.
So the question- does the book symbol showing stop the prog feature from working?
In the first cold snap I can't recall if the book was up or not.

Suppresses the fans for a bit when very cold until it has warmed up a bit.

Flossie · Jan 18, 2023

kermit_rr said:
Have to ask, how do you know the heated screen isn't working? Could just be the bulb? If it's condensation on the inside it can take ages to shift!
I notice when it's on, the elephants twinkle slightly when the sun catches them

No elephants round here

.
Thin ice and lots of fluffy snow, it normally clears quite thick ice in under 10 mins, rear screen cleared quickly, just snow on that though.

Grrrrrr · Jan 18, 2023

Flossie said:
Front screen, fan speed and maybe, probably the heated seats didn't work. When I realised nowt was happening I turned off prog and tried the heated screens, front didn't work but the rear was, unsure if that rear screen was working during the prog session or just when I pressed the hrw button.
I was very happy with the prog feature but now I am sad.

On the other hand if nothing is working then that sounds more serious.

Datatek · Jan 18, 2023

kermit_rr said:
Have to ask, how do you know the heated screen isn't working? Could just be the bulb? If it's condensation on the inside it can take ages to shift!
I notice when it's on, the elephants twinkle slightly when the sun catches them

The bulb works even when the screen has failed.

kermit_rr · Jan 18, 2023

Datatek said:
The bulb works even when the screen has failed.

Do we know the light is coming on?

Flossie · Jan 18, 2023

Yes it was.

kermit_rr · Jan 18, 2023

If i recall, the drivers side relay is triggered, that sends power to the passenger side relay. If one doesn't work, they both don't. I think

Flossie · Jan 18, 2023

Something has occurred

Went to pick the Doris up, windscreen clear before I set off, pressed prog anyway and off I went. About 2 miles into the trip the fans went to full speed on their own and I noticed the book symbol was gone

. Dunno if it's fixed itself

P38A Prog question.

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