Recently had my ride repaired for heat. It worked for a few weeks and now I once again have no heat.

97 Blazer, new heater core already done. Any help?

 

Make sure the radiator and resivor are properly topped off. Any trapped air in the system will cause loss of heat.

 

Hi!
You didn't mention what type of work was done, however you most likely have a leak in the cooling system. When it's low, you will not get good heat.

To check the fluid level, do not rely on the overflow bottle. It will not be accurate if the system is leaking. You should read this information about refilling your cooling system.

If the proper fill of your cooling system fixes your 'no heat' problem, then you know you have a leak somewhere. Get it tested by a cooling system professional.

Hope this helps!

 

How does the water, (or mixture) look in the radiator? Is it clean, or rusty? If there is a fair amount of rust flakes in it, it could be plugging the heater core. Or what about the thermostat? Just a couple of ideas to throw out there.

Good luck.

 

i am also having problems with my heat iv got an 88 s10 blazer i cant change the vent selection and the fan when on hi blows like it should on low i dunno what to do every time i go somewhare i freez plz help

~matt~

 

! 1/2 years ago new heater core installed, two months age complete flush and fill. Coolant looked like someone had added regular green antifreeze in the dextron.
After this I had heat for about a month then it went away agin.

Thanks for the help and sorry for the delay in responding I,ve been out of town.