OTR Heat

[buswarrior]

Go to the valve, not the switches.

On the MCI, it was one wire attached to the valve.  Lots more wires further up stream for the temp sensor, blah blah blah.

Go to the device, it usually is simpler.

happy coaching!
buswarrior

[richard5933]

Here's the water valve. There are four wires got to it. Anyone know which is 'the' wire that the manual says I should disconnect in order to get the valve to open?

1964 PD4106-2412

[richard5933]

Here's a view of the other side of the valve in case anyone wants to see.

1964 PD4106-2412

[buswarrior]

take 'em all off? each one, one at a time? Don't let them touch anything or each other.

The pipe will get hot right away, if it opens, if coach is warmed up, and running.

GM experts, is that also a copper airline?

If so, is it getting its air supply?

Some stuff I wished I paid more attention to, long ago and far away...

happy coaching!
buswarrior

[Scott & Heather]

I'm with BW, remove the lines one at a time until you get flow. If you don't get flow after this, at some point I'd remove the valve.


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[richard5933]

This might show my beginner's lack of knowledge, but maybe I'm looking for heat when the bus thinks it know better...

When I first start the bus on a cool morning, the 'heat' tell tale lights for a few minutes. According to the manual, this is telling me that the system thinks the passengers will be chilly if I don't turn the heat on. If I'm correct, that would me turning the knob next to the driver's seat to 'warmer' and then letting the system run.

My understanding is that the point at which this tell tale lights up is determined by the setting on the grad-u-stat (located in the floor vent, passenger side).

So, unless the tell tale light on the dash is on, no amount of trouble shooting on my part is going to get the heat to blow warm.

Anyone able to confirm that I've got that right?

Richard