Harman Help PB105

I have picked up a used pb105, it was/or could of been damaged by a sprinkler system. I have connected the boiler, and proceeded to turn it on when I have encountered the status light blinking three flash which indicates a fault in the ESP probe. I went to my local harman dealer and purchased a new ESP and installed it. IT did not cure the flashing three light on the status...

I returned to the dealer explained my problem and we came to the mutual agreement that it must be the control panel. So I purchased a new CP. Installed the new panel and I still have the flashing three error..

Anyone have any good ideas?

In the owners manual it says its only the ESP probe. (exhaust sensing probe)

After reading the thread below, I discovered that I did not have the dip switches all turned down on the new CP. All is well, the boiler is running normal. New ESP $80...new CP..$200. DIY Plumbing installation about $400. Stove pipe $300. Used PB105 $3000. So for under $4000 I have a excellent running PB105.


https://www.hearth.com/talk/threads/harman-esp-test.106847/

OK, so I could use a little more help.

After replacing the esp probe, the control panel, and the aqua temp.sensor. The water controls still do not work. Only the "off" works on the low temp knob.

Right now I'm running 2 on the feeder knob, and still going thru 3.5 bags a day.

thanks for your reply, I did read that thread/post.

I should of added to my post that when I bought the pb105 it didnt have a aquastat well so I picked one up at the local plumbing store, its a brass well which is 4 or 5 inches deep, I did make a copper shim to hold the probe tight. How deep is the stock aquastat well?

Of course when you buy the sensor it doesn't come with the spring and plastic part.

Thankyou for your input.

No, here is the one I used.

http://www.ebay.com/itm/Honeywell-1...329?pt=LH_DefaultDomain_0&hash=item58bd1848a1

There is quite a difference in the two. There is no jacket for the Honeywell.

Just ordered it. I'll post back in a few days after I get it installed. Thanks for your help.

Installed and working properly. Although its completely obvious that I'm going to have to add some zone valves on thermostats.

I'm sure it will be. I still need to add some zone controls, but that's the easy part now that it's performing normally.

Now that it's in the upper 20s low 30s I'm literally turning on for an hour in the morning and an hour in the evening. oh the joy of thermal mass.