* Wiring Issues: The most likely culprit is a wiring problem during the remote start installation. The installer may have accidentally:
* Disconnected or damaged a wire: A crucial wire related to the ignition system could have been loosened, cut, or shorted.
* Incorrectly connected a wire: A wire might be connected to the wrong terminal, causing a conflict.
* Poor connection: A loose or corroded connection can interrupt the signal.
* Faulty Remote Start System: The remote start unit itself could be malfunctioning. While it worked for a while, a component might have failed.
* Fuses: Check the fuses in your car's fuse box. A blown fuse, possibly caused by a wiring issue, could be preventing the car from starting. Consult your car's owner's manual to locate the fuse box and identify the relevant fuses.
* Immobilizer System Interference: Some remote start systems can interfere with the car's immobilizer system (which prevents theft). This is less likely, but possible. The installer may not have properly integrated the remote start with the immobilizer.
What to do:
1. Check the Fuses: This is the easiest and safest first step.
2. Contact the Installer: The installer is responsible for their work. This is the most direct path to a solution. Explain the problem clearly and see if they'll troubleshoot it under warranty.
3. Have a Professional Diagnose it: If the installer is unhelpful or unavailable, take your car to a qualified mechanic or auto electrician. They have the tools and experience to diagnose wiring problems and remote start system malfunctions. Tell them the remote start was recently installed.
4. Disconnect the Remote Start (If Possible and Safe): As a last resort, if you're comfortable working with car electronics (and understand the risks), you could try disconnecting the remote start system to see if the car starts normally. This is not recommended unless you're experienced. Improper disconnection could cause further damage.
Important Note: Do not attempt extensive electrical work yourself unless you have the knowledge and experience to do so safely. Incorrect wiring can damage your car's electrical system or even cause a fire. Professional help is the safest option.