Heater wont come on.

It's hard to say for sure since it sounds like it could be many things. If you turn the key and you hear a few clicks coming from the engine and then nothing, it could mean a very very weak battery. Your first step should be trying a different (fully charged) battery. Good luck.

What happens when you try to start it? Do you hear a small click or a heavy clunk? Is there a good connection between your negative post on your battery and ground? Between your positive post and the starter solenoid?
If you don't hear anything, the relay or the fuse for the power to the relay could be blown. Check the fuse, first, then the relay.
If those are fine, the neutral safety switch could be stuck or the connection may have come off. Try shifting back and forth a few times with the key on, then try cranking again. If nothing happens, you will need to check the connection and the relay. The simplest thing to do is to bypass the switch, which is mounted on your transmission. Disconnect the switch and connect a jumper across the connectors on the plug. If it cranks, the problem is your switch.
If you're hearing a click, but it doesn't crank and you know your starter is good, it could be the starter solenoid, mounted on the starter, or the wire going to it. You can check the solenoid by briefly connecting a jumper wire from the large positive post on the solenoid to the S terminal. Make sure the vehicle is in park with the brake on and the wheels blocked, as this will crank it over if the solenoid is ok and you have power and ground! If it makes a big clunk, but the engine does not crank over, your engine is seized, and you have serious problems to deal with.

Sounds like the pump has seized.

a couple of things,1 blower motor fuse.2 blower motor gone out.3 switch on fan speed control switch not sending signal to fans.after checking the fuses.next check theswitch on control panel.set ac or heater.if fan still doesnt come on then replace it.when it work and then stops working there are a lot of possiblities that caused the prob relay too not fliping over inside staying close loop.hope this helps.

Could be several things....but i need more information. When it doesnt start, does it crank or when u turn the nothing at happens other than the relay?

well it could be many things first check fuses then there might be too much or not enough freon in system and also check vacume lines to heater controls hope this helps its a starting point

Does the starting solenoid engages? This is would sound like a deep clunk on your starter. When the solenoid engages it close the contact that energize the starter motor, but a worn contact on the solenoid would result in it engaging but not having enough current to turn the engine resulting in a clunking noise when you try to start.
The starter solenoid gets its 12 volt from a relay. This is referred to as the starter relay. If you try to crank, and you hear only a click but the starter do not turn, then the contacts on the relay maybe worn.
To sum it up, if you hear a loud clunk when it dont crank, its the starter solenoid. If you hear just a click but no crank, it could be the starter relay.

take out the blower motor
if the bearing is ok

use a vacuum cleaner to suck out the debris in the piping

If you aren't afraid of jacking up the vehicle, you can test to see where the problem is coming from. Jack the vehicle up by the pinch well (most newer cars have grooves cut out or that can be popped out behind the front wheels). When the wheel is in the air, try moving it side to side, then up and down. Excessive side to side movement indicates a tie rod end, up and down indicates a ball joint, and all around indicates a wheel bearing which would also be a cause for the clicking sound you are hearing.

Most auto shops will check this for you free of charge when you get an oil change, since they're trying to sell you things anyway.

if it clicks when you try to start it might be the battery.
Turn on the lights and try to start.. and see if they dim out,
if so replace or charge the battery KC