1998 isuzu omhbre intermitent heat the heat works some time start it at home and go to store and heat works great leave the store and no heat . radiator is full /fan works for heat and air ac works when no heat turn temp up no heat

Wrong belt. Check with parts store make sure you got the right belt. If that's not the case then one of your pulleys are worn out and causing it to jump time

The actual relay is in a box called "alarm" which is mounted behind the glove box under a vent. The alarm part is a chip that dings when you leave the keys in the ignition. The box has other relays including one for the horn.
The circuit board and box are a couple of hundred dollars from the dealer, or you can solder in a new relay for the wipers.

sorry to say but sounds like heater core needs replaced might try back flush and see if that helps but it most likly wont help much but will let u know for sure if that is problem because it will help alittle (after all it dose take alot of time to change core) hope it helps

that is a check engine light that means there is a problem with one of the engine sensors for the computer system you heed to get the computer scanned to see whats wrong i suggest you buy a cheap scan tool at an auto parts store then you can scan any car you have at any time you need to the 59 dollar scanner works great they work on 97 to present cars and trucks hope this helps and please dont forget to rate my solution

The motor goes bad because leaves and such make their way down and clog it's air intake. Pick up a new one at your local auto parts store if you have to.

It's four screws on the motor housing, located under the glove box (2 screws) and the wiring is harnessed, so no sweat there.

While it's off, reach up into the cavity that feeds it air on the upper left.

You may want to wear a glove. The design on this generation Rodeo is horribly flawed. I pulled a squirrel-sized wad of rotten leaves and pine needles from mine after replacing the motor and resistor twice.

Like drinking a milkshake through a coffee stirrer, you know that's bad for a motor. I clean mine out every fall, before running the heat non-stop all winter.

Some possible causes: broken timing belt, or fuel pump not working (could be fuse or relay), or bad ignition coil.

Since you replaced the filter it sounds like a classic fuel pump problem. Don't know your car but best thing to do is buy a repair manual for your car like haynes or chilton's at your local AP store. Read up on it at the trouble shooting section and the RR section. Good luck.

check all your connections to your alternator,starter and your battery But you you are hearing the starter "click" but not engage..try tapping on the starter with a hammer if it is easy to get to..this some and sometimes does work..but your starter solenoid can be bad..the starter can be bad..igntion module a number of possibilities..goto your local parts store or public library and purchase a repair manual or check one out at the library

Sounnds like a thermostat sticking open at times, or, the temperature regulator inside the vehicle is malfunctioning.