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I get a service code of ext sw1 - Jandy Laars LX Pool Heater / 400,000 BTU / Natural Gas

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EXT SW1-FUSABLE LINK/VENT SWITCH OPEN ON JANDY POOL HEATER


Open up the front panel on the heater you will see 2 white wires going to the thermal fuse, pull both leads off the thermal fuse ,take a jumper wire and connect it between the two wires . Does the fan come on ? if so remove the jumper, if not put the leads back on the thermal fuse and remove the thermostat panel on the top of the heater on the right side there will be 2 screws on the bottom of the panel remove them and pull the panel up and out of the way as much as possible look inside to top right in about the middle of the heater you will see 2 white wires going to a switch (overheat switch) with a red button in the middle, push on that button and reset it, if the fan still does not come on take your jumper wire and put it between the 2 white wires on the overheat switch does the fan come on? If it does great but don't leave the jumper in , remove it and put in a new overheat switch ,but that only fixes the switch because there is still a problem of why that happened. First thing is to check the heat exchanger for soot build up or a blocked exhaust fan and check your gas pressure my guess is it is low. But do not run that heater with any bypass jumpers in or your asking for a fire .

Apr 14, 2013 | Jandy Laars LX Pool Heater / 400,000 BTU /...

1 Answer

How do I service my stability control on my 2002 Cadillac ext


You need a scan tool to get the code or codes.This is the only way to diagnose and repair the problem.I found a couple of bulletins but you need to get the codes first to see if they even pertain to the problem you are having.If you get the codes I can help you find the problem.Hope this helps.Good luck.

Feb 25, 2012 | 2002 Cadillac Escalade Ext

1 Answer

Transmission filter {spin on} keeps loosening off. Replaced filter twice now still keeps coming loose. Any ideas? 1993 Saturn Wagon 1.9L Engine code 7


First off an engine code 7 would mean it is a DOHC and an SW2, not SW1.

Do you have a dealer filter or aftermarket? The aftermarket have fitment issues (as well as flow issues) and it is best to use a dealer one.

Second, make sure the magnet is not on the filter area where it spins on. That can be removed during the first transmission fluid and filter change. It is only put on from the factory and removed afterward.

Feb 02, 2010 | 1993 Saturn SW1

1 Answer

I have a 2000 Nissan Xterra SE V6. My center


Before you begin to diagnose and test the stop light system (that's what's it's called in the service manual), you should look at the following
wiring diagram to try and understand how the system work. This will help you to logically walk through the diagnosis process.

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TESTING FOR “OPENS” IN THE CIRCUIT

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Continuity Check Method
The continuity check is used to find an open in the circuit. The
Digital Multimeter (DMM) set on the resistance function will indicate
an open circuit as over limit (no beep tone or no ohms symbol).
Make sure to always start with the DMM at the highest resistance
level.
To help in understanding the diagnosis of open circuits please refer
to the schematic above.
1) Disconnect the battery negative cable.
2) Start at one end of the circuit and work your way to the other
end. (At the fuse block in this example)
3) Connect one probe of the DMM to the fuse block terminal on
the load side.
4) Connect the other probe to the fuse block (power) side of SW1.
Little or no resistance will indicate that portion of the circuit has
good continuity. If there were an open in the circuit, the DMM
would indicate an over limit or infinite resistance condition.
(point A)
5) Connect the probes between SW1 and the relay. Little or no
resistance will indicate that portion of the circuit has good continuity.
If there were an open in the circuit, the DMM would
indicate an over limit or infinite resistance condition. (point B)
6) Connect the probes between the relay and the solenoid. Little
or no resistance will indicate that portion of the circuit has good
continuity. If there were an open in the circuit, the DMM would
indicate an over limit or infinite resistance condition. (point C)
Any circuit can be diagnosed using the approach in the above
example.

Voltage Check Method
To help in understanding the diagnosis of open circuits please refer
to the previous schematic.
In any powered circuit, an open can be found by methodically
checking the system for the presence of voltage. This is done by
switching the DMM to the voltage function.
1) Connect one probe of the DMM to a known good ground.
2) Begin probing at one end of the circuit and work your way to
the other end.
3) With SW1 open, probe at SW1 to check for voltage.
voltage; open is further down the circuit than SW1.
no voltage; open is between fuse block and SW1 (point A).
4) Close SW1 and probe at relay.
voltage; open is further down the circuit than the relay.
no voltage; open is between SW1 and relay (point B).
5) Close the relay and probe at the solenoid.
voltage; open is further down the circuit than the solenoid.
no voltage; open is between relay and solenoid (point C).
Any powered circuit can be diagnosed using the approach in the
above example.

TESTING FOR “SHORTS” IN THE CIRCUIT

To simplify the discussion of shorts in the system please refer to
the schematic below.
c2ba473.jpg

Resistance Check Method
1) Disconnect the battery negative cable and remove the blown
fuse.
2) Disconnect all loads (SW1 open, relay disconnected and solenoid
disconnected) powered through the fuse.
3) Connect one probe of the ohmmeter to the load side of the fuse
terminal. Connect the other probe to a known good ground.
4) With SW1 open, check for continuity.
continuity; short is between fuse terminal and SW1 (point A).
no continuity; short is further down the circuit than SW1.
5) Close SW1 and disconnect the relay. Put probes at the load
side of fuse terminal and a known good ground. Then, check
for continuity.
continuity; short is between SW1 and the relay (point B).
no continuity; short is further down the circuit than the relay.
6) Close SW1 and jump the relay contacts with jumper wire. Put
probes at the load side of fuse terminal and a known good
ground. Then, check for continuity.
continuity; short is between relay and solenoid (point C).
no continuity; check solenoid, retrace steps.

Voltage Check Method
1) Remove the blown fuse and disconnect all loads (i.e. SW1
open, relay disconnected and solenoid disconnected) powered
through the fuse.
2) Turn the ignition key to the ON or START position. Verify battery
voltage at the battery + side of the fuse terminal (one lead
on the battery + terminal side of the fuse block and one lead
on a known good ground).
3) With SW1 open and the DMM leads across both fuse
terminals, check for voltage.
voltage; short is between fuse block and SW1 (point A).
no voltage; short is further down the circuit than SW1.
4) With SW1 closed, relay and solenoid disconnected and the
DMM leads across both fuse terminals, check for voltage.
voltage; short is between SW1 and the relay (point B).

GROUND INSPECTION

Ground connections are very important to the proper operation of
electrical and electronic circuits. Ground connections are often
exposed to moisture, dirt and other corrosive elements. The corrosion
(rust) can become an unwanted resistance. This unwanted
resistance can change the way a circuit works.
Electronically controlled circuits are very sensitive to proper
grounding. A loose or corroded ground can drastically affect an
electronically controlled circuit. A poor or corroded ground can easily
affect the circuit. Even when the ground connection looks clean,
there can be a thin film of rust on the surface.
When inspecting a ground connection follow these rules:
1) Remove the ground bolt or screw.
2) Inspect all mating surfaces for tarnish, dirt, rust, etc.
3) Clean as required to assure good contact.
4) Reinstall bolt or screw securely.
5) Inspect for “add-on” accessories which may be interfering with
the ground circuit.
6) If several wires are crimped into one ground eyelet terminal,
check for proper crimps. Make sure all of the wires are clean,
securely fastened and providing a good ground path. If multiple
wires are cased in one eyelet make sure no ground wires have
excess wire insulation.

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Apr 06, 2009 | 2000 Nissan Xterra

1 Answer

1993 Saturn SW styles


SW1 is a single overhead cam. SW2 is a dual overhead cam both have multi port injection.

Dec 16, 2008 | 1993 Saturn SW1

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