Heater

I have a 1986 Toyota Celica gts and my heater goes from hot to cold or it's
just cold or it's just luke warm but mostly it goes from hot to cold. Fans
are working fine. How can I fix this?

"Maty" <mikematy@worldnet.att.net> wrote:
[color=blue]
>I have a 1986 Toyota Celica gts and my heater goes from hot to cold or it's
>just cold or it's just luke warm but mostly it goes from hot to cold. Fans
>are working fine. How can I fix this?[/color]

I had this problem once, turned out to be the lining inside one
of the heater hoses that take coolant back to the heater core had
split and would 'close off' the flow through the hose
occasionally...replaced them both...fixed'er...
--

-Gord.
(use gordon in email)

"Maty" <mikematy@worldnet.att.net> wrote in message
news:b80365304f00a02a39f3626bbf811f3c@localhost.talkaboutautos.com...[color=blue]
>I have a 1986 Toyota Celica gts and my heater goes from hot to cold or it's
> just cold or it's just luke warm but mostly it goes from hot to cold. Fans
> are working fine. How can I fix this?
>[/color]

First, check the coolant level and condition. The coolant level in the
radiator should be at the bottom of the radiator neck and above the cold
mark in the overflow tank. The coolant should not be rust or
milkshake-colored.

If the coolant level is low, top it off with the proper coolant mix.

Then have someone in the car move the temperature control from cold to hot
and observe its action on the heater control valve on the firewall. You
will see a wire cable moving an arm on the heater hose. Make sure the cable
moves the valve to its limits.

Then check the thermostat operation by removing it, placing it in a pan with
water and a thermometer, and heating the pan. Watch the temperature at
which the thermostat opens, it should be around 140 degrees F.
--

Ray O
(correct punctuation to reply)