Most likely your thermostat is bad. If you are not getting heat it is stuck open. If it sticks closed, your engine will overheat and be ruined. I would replace the thermostat A.S.A.P.
timing belt snapped
Yes
its only a small engine??
Possible cause is the crankshaft position sensor if you have a bad alternator then your battery can drain while the car is running DOn't know when did you changed cables lately but arching on one of them will do that. Check the cables for any damage or wear. Also look at distributor while you're there.
First thing to check is the pcv valve.
Take it to an expirienced mecanic if you do it wrong you will cause serious engine damage.
If a Hyundai Elantra stops running after an hour on a running speed temperature, it could be a bad thermostat. It is best to have a mechanic take a look at it to determine the exact cause.
When a car, such as a Hyundai accent, has and broken idle control valve the engine may or may not start. Idling is controlled by this part and the car a malfunctioning unit can cause the car to act erratically, such as starting at random times and stalling.
Take it to an expirienced mecanic if you do it wrong you will cause serious engine damage.
Many things can cause the air bag light on. Could be the passenger seat weight sensing system needs to be recalibrated or fixed. Best would be to teake the vehicle to the HYUNDAI dealership and check the codes and then go from there.
An incorrect fouler and a cracked piston ring.
Poor air flow from a 2004 Hyundai Accent air conditioning system can be caused by a clogged cabin air filter, a malfunctioning blower motor, or a refrigerant leak. It is recommended to check these components to pinpoint the exact cause of the issue.