Furnance not blowing warm air

5c. Re: Furnance not blowing warm air
Posted by: “R. G. Lowe” rglowe7@cs.com sherwoodrealty
Date: Sun Feb 25, 2007 3:05 pm ((PST))

Before replacing the Board, I suggest you troubleshoot the furnace. Before going too far ensure that you have sufficient LP pressure and proper voltage to the furnace. Read TechTip #8 on our website for troubleshooting detail.
Here is the link. http://www.rv-partsplus.com/home/tech_tips/rv_tech_article8.php
My guess, if the voltage and pressure are within tolerance, is that the overheat limit switch has failed especially if it is the bimetallic type. One item often overlooked is that Suburban (I know not Atwood) recommends cycling the furnace. Turn off the propane, turn off the thermostat and let the fan stop for two minutes. Then turn on the propane and then the thermostat then raise the temperature well above room temp.. With newer electronic thermostats you also need to ensure that the furnace is seeing a call for heat at the furnace. Check for voltage on the thermostat lines when the furnace is first starting. If all tests prove that the remaining components are OK, before tossing the Board, I would remove and reinstall the (white) board edge connector. It is very common for corrosion to build up between the copper contacts on the board and the tin contacts in the connector. We recommend spraying Corrosion Block on those connections to combat their natural tendency to corrode and set up high resistance. Your coach is of the age where this corrosion will cause the problems you are experiencing.
Let us know after following this step by step diagnosis what you found.
Robert Lowe
BOA 696   BU 4223
2002 Bounder 39Z

X10 Home Automation with heyu and older Macs

X10 Home Automation with heyu and older Macs

This experiment may be of some interest to a small number of XTension users. It’s useful for people who have late model Power Macs that have the original Mac serial ports (the round DIN-8 connectors) that have G3 or G4 processor upgrades. This includes 7500-9500 machines as well as the early Apple G3 boxes (and probably iMacs with serial port upgrades, etc.)

I wanted to find a way to set up a Power Mac 8500 with a G3 processor upgrade so it could run OS X and perform some useful home automation work. The first challenge is getting OS X to run, which is fairly trivial using “XPostFacto”.

I now have a 8500 running Jaguar with the latest Apple developer tools installed. Nice, but no easy way to talk to the old CM11a I have laying around. So I hooked it up to the modem port and searched the net for an old Linux program I remembered called “heyu”.

Turns out that heyu builds just fine on OS X with 2 changes. The makefile craters, but simply typing “./Configure freebsd” on the command line in the heyu directory will generate a proper makefile for OS X. Second, you have to edit the x10.h file and change the location that heyu will use to create lock files. Just change:

#define LOCKDIR “/var/lock”


#define LOCKDIR “/tmp”

Then you can simply type “make” and get a heyu executable in the local directory. All that’s left to do is to edit the x10config file, changing the TTY definition to “/dev/tty.modem” (or “.printer”) and adding the appropriate unit aliases if you care. Save a copy as “~/.x10config” and you’re done.

The heyu docs talk about issuing a “make install” command as root so the binaries and documentation go to the right places. Don’t bother unless you really want to. From the heyu directory, you can simply enter commands like:

./heyu turn A01 on

and things should work as expected. Where it really gets fun is using the “do shell script” AppleScript command. You can take that command line above and pass it to the “do shell script” command and work the CM11a from good old AppleScript. E.g.,

do shell script “~/heyu.dir/heyu turn A01 off”

I haven’t tried using heyu on a more modern Mac with a USB->serial converter, but I’m guessing that if you can find the right device name in the /dev directory it should all work as expected.

Please feel free to repost this and/or correct as necessary. This took about 10 minutes to figure out and about as long to write up, so it’s certainly not as detailed as it might be.


Filters for Onan Generators

2c. Alternative Sources For Generator Parts
Posted by: “Thomas G. Norman” tomnorman457@yahoo.com tomnorman457
Date: Thu Feb 15, 2007 7:15 am ((PST))

Fram has an excellent cross-reference guide on their website. Here are cross-reference part numbers for our Onan Marquis 5000:

Air Filter: OEM Onan is 140-2379. Fram CA8235 works just fine. Another alternative is NAPA FIL2362. I’ve been using Fram air filters for years with no problems.

Oil Filter: OEM Onan is 122-0645. Fram PH3614 or Motorcraft FL-400S both work. Another alternative is NAPA FIL1374. I’ve used both Fram and Motorcraft oil filters for years with no problems.

Plugs:  OEM Onan is 167-0272-99, with a .025 gap. The OEM plugs that came on the genset were Champion RS17YX. Bosch Platinum 4211 also work.

Fuel filter:  OEM Onan is 149-2279. I have not been able to find any cross-reference part number for the Onan fuel filter. Perhaps someone else on the forum has been able to do so and will post the information.

Zen-Noh is the largest farm coop in Japan

Zen-Noh is the largest farm coop in Japan. They own Consolidated Grain &
Barge Company , which has country elevators, & river terminals in the
Midwest. It has an elevator in New Orleans for loading grain from barges to
ocean freighters . They used to buy tractors & have them labelled with
their name. When I was in Japan 3 years ago, our group met with Zen Noh
representatives. I asked one of the vice -presidents if they still had
tractors labelled in their own name & he told me they didn’t. I think a lot
of the tractors that are labelled Zen Noh are being labelled that way by
the exporter. A few years ago there was talk that Yanmar was going to stop
the importing of Yanmars, so to protect there sales the exporters started
changing the labels. Parts are not as easy to get as walking in to a JD
store, but if you contact the right people , most parts are available either
new or used. Go to: SheaffersTownCountryTractors for other compact
tractor information. I can supply you with parts and manuals.
Leonard at Sheaffer’s. I can be contacted at sheaftractor@grics.net
for more info.

Mac Marginalization: GPS

Mac Marginalization: GPS
Dan Simpson
I am one of the Odd Balls that uses a Lowrance iFinder GPS and a Mac. Until now I have been unable to use my GPS Data files with my Mac. Lowrance uses a proprietary file format that no Mac GPS software can read…until now.

I recently discovered an app called Load My Tracks from ClueTrust. It converts Lowrance .USR files into .GPX and .KML formats.

I am not affiliated with Lowrance or ClueTrust. I am just happy to have my stuff working together and I want to pass it along to other Mac/iFinder users. I can’t be the only one…can I?

GpsPasSion Forums – Map Update Using a Mac

GpsPasSion Forums – Map Update Using a Mac
1. obtain the v8 udpate DVD (this is not the risky part [g]). Go to garmin.com and follow the links to set up a MyGarmin account and obtain an unlock code. Copy that code to your desktop in a Sticky or text file. Be sure it contains no spaces or dashes.

2. connect your nuvi to your Mac USB port (neither is this risky, as long as you un-mount it properly – see step 6).

3. MANDATORY! Do a complete backup of every file on your nuvi. This is your best hope for avoiding trouble or recovering from it – I have in fact successfully reformatted my nuvi, erasing everything, and re-installed v7 with no problem – all on a Mac. Note that v7 came on my unit and therefore I did not have to do any unlocking stuff.

4. copy the gmapprom.img file to the Garmin folder on your nuvi from the DVD. It is located in the Rgn folder on the disk. This should take a long time – as much as an hour to transfer the 943.1 MB in v8. This will erase v7. No turning back now. Be sure your Mac is set not to sleep or spin down its hard drive.

5. create a file called gmapprom.unl in a plain text editor. Put the unlock code, in the proper format, into this file (no dashes or spaces) and save it to your nuvi’s Garmin folder. The code is 25 characters, in something like this format (this is my old V7 code, randomly changed to prevent mischief): 5XXXXX9E1ZSSF7U88G6Q2ZZVL. Make sure your Mac is not adding an extension other than .unl.

6. be sure to empty the trash first and then eject your nuvi as you would any external drive device. OS X 10.4.x will not allow a proper dismount this way, however. So launch Disk Utility and select the nuvi, then click Un-Mount (not Eject). It is then safe to unplug the USB cable.

Nuvi should reboot and if you press Settings, then Map Info you should see v8 in the menu.

If v8 does not appear, power off and restart your nuvi then re-mount it and look for the 943.1 MB gmapprom.img file and verify the contents of your unlock code file (gmapprom.unl). Check for typos in the code or a stray CR or LF in the file. Be sure no other codes are in it.

If things go horribly wrong, don’t panic. You can get back to v7 if you are careful. If, for example, you end up with garbled filenames in the nuvi directory and severely impaired nuvi functions, use Disk Utility to format the nuvi “drive” as an MS-DOS file system drive.

Then drag all the backup files you created in step 3 (see why this is a vital step?) back onto your nuvi. It will take up to an hour, but at the end you should have a working nuvi with v7.

GpsPasSion Forums – Firmware updates with Macintosh

GpsPasSion Forums – Firmware updates with Macintosh
This info has become scattered or dropped off the board, so here is a quick tutorial on how to upgrade nuvis using a Macintosh OS X computer. (The same general technique works on Windows machines.)

Here’s how I did a firmware update on my nuvi, using a G4 iMac running OS 10.3.9. Standard disclaimer: I cannot take any responsibility for the results.

Download the updater from Garmin. It’s a Windows executable (exe) self-extracting archive, but fear not. Launch Stuffit Expander and drag the exe file onto its icon. Stuffit handles it just fine – as long as you use Stuffit v10 or earlier. Stuffit v11 does not work. Ignore the extracted Windows-only programs with names like Copy2Card.exe.

Using the supplied USB cable, mount the nuvi on your desktop. If you are updating from firmware version 2.9 or earlier, be sure to make a backup copy of the waypoints.gpx file (or current.gpx under newer FW versions) in the nuvi’s Garmin folder.

As with all nuvi procedures, be sure you have a FULL backup of your nuvi before changing anything.

Use a removable SD card, not your nuvi’s internal storage, for the update procedure.

Using an SD card, either in a card reader (faster, if you have USB 2.0), or using the nuvi to access your SD card (slower), drag the Garmin folder from the extracted archive to the SD card. Be certain that you are NOT replacing the Garmin folder in your nuvi’s main directory (you will lose your maps). Unmount the nuvi and the SD card the same way you would eject any USB device from your desktop. If nuvi automatically re-mounts, use Disk Utility to un-mount it.

Turn the nuvi off and to be safe, plug it into its AC adapter. With the SD card in the nuvi’s slot, turn the nuvi back on. Be patient and do not interrupt it while it goes through the entire update process. Then copy your waypoints file (which includes “Favorites”) back into the nuvi, if necessary.

Note that the only requirement for the SD card to accomplish the update is that it have the Garmin folder on it. Existing files such as MP3s or photos do not need to be removed, as long as there’s room for the updater folder. Once the firmware is updated, you do not need the card or the updater for the GPS to work properly.

To be sure you get such extras as voices and GPS SW updates at the same time, try this method supplied by FreeBird using v3.30 as the example:

(make a backup of the changed/deleted files first).

1.) Extract from downloaded Offline Updater V3.30 the two .bin files (006B047800.bin is the GPS SW and 006B048201.bin is the TMCxx SW).
2.) Copy the two files into the Garmin directory on the Nüvi (overwriting or saving the existing files).
3.) Delete the file GarminDevice.xml in the Garmin directory on the Nüvi.
4.) Restart the Nüvi in normal mode (not connected to the PC).

Heater AC Blower Fan Motor (List of vehicles that share the same motor)

Heater AC Blower Fan Motor (List of vehicles that share the same motor)
If you are going to a Junk Yard and need a blower fan, I found this Application Chart, looks like all these vehicles share the same blower fan.

MAZDA 808 / MIZER 76-77
MAZDA RX3 76-78