I have a astrostart key fob # 4204a. can I use a astroflex J5F-TX2000 to replace if.

I would suspect it needs the power cell in the key fob replaced.
It may have enough electricity left to work the little LED indicator but not enough to transmit. If this is the fob you use most of the time it would make since that the battery would be depleted before the other just because of the higher use.

Replacing the battery cell in the fob is what I would try first.

[PDF]MODEL RSS-5225 - DirectedDealers.com

www.directeddealers.com/manuals/OG/Astrostart/RSS-5225_OG-Eng.pdf

Immediately report any malfunction to the AstroStart dealer that performed the ... Always turn off the main switch when not using the remote starter for .... The startmodule will inform you of the status of door locks, the alarm and of the engine. .... If the trunk is opened for more than 5 minutes, the system switches to the.

How do you reprogram an AstroStart remote HST5224

www.answers.com > Wiki Answers > Categories > Cars & Vehicles

In order to reprogram an AstroStart HST5224 remote, you must putthe key in the ignition ... lamp) b, press and hold UNLOCK button, after 1 second key LED will flash once c, .... C. Turn the ignition to ON (Do NOT Start) then back to OFF. ... B.Immediately after letting go of the lock and unlock buttons, press the lock button by ..

If its new it should still be covered by the warranty Astorstart support services will help you get it paired.

Technical Support: E-mail: support@astrostart.com Hours: 8:30 a.m.-7:30 p.m. ET, Monday-Friday 10 a.m.-2 p.m. ET, Saturday Find a Store (by phone): Find a Store (online): Store Locator

astroflex is owned by Astrostart, their phone is 1-800-361-7271

Get under the dash or where the unit is located.
You will see 8 or 9 dip switches on the unit with an LED beside them.
Turn switch 1 and 8 on.
Press and release the brake. (LED will flash)
Press and hold start button on remote. (LED will flash and parklights will flash once.
Turn switch 1 and 8 to off.
Press and release the brake (LED will flash once)
In future would be a good idea to supply vehicle details etc as can sometimes be a known condition , that saves time looking it up , good luck

take the key and the vehicle to a service dealer as sometimes it is necessary to have the key reprogrammed to the immobiliser in the CPU program

Try posting to Cars & Trucks for a Auto expert.

your local shop , if they know what they are doing and have bought somthing like a snap-on motis then they can program any vehical for keyless entry .

seemingly this would be under a bumper to bumper 5 year warranty. replace the battery and take the car to a dealer. have them check the remote, takes 2 minutes, and if it is no good ask for another. if it is good have them reset the car to "know" the remote, in the biblical sense.

Try this one
http://www.astrostart.com/Support/Guides.aspx