93 maxima GXE engine "cold" no heat

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maxhead1 - 20 Dec 2004 18:28 GMT

I have a 93 Nissan Maxima, the car runs Ok in warm weather, but when the
weather gets cold the following happens:
When the engine is idling the Temperature Gauge (in the dash board) is
normal and there is sufficient heat. However, when the temperature is
cold (at or about freezing) and I start driving the temperature gauge
slowly drops and so does the heat in the car, regardless if I have the
heat on or not the temperature gauge goes down to C. This condition occurs
faster when I am driving at higher speeds (e.g., highway) the temperature
gauge goes down slowly to below Cold (C) and the heat goes down with it.
I have replaced the thermostat and the coolant has been flushed.

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chappy - 21 Dec 2004 14:22 GMT

My wife's 96 maxima has a similar problem. The A/C works great in the
summer but never reaches operating temperature and has NO heat in
winter. No matter how long I drive it the dash stat stays at C and
never produces heat. Any suggestions?

> I have a 93 Nissan Maxima, the car runs Ok in warm weather, but when the
> weather gets cold the following happens:
[quoted text clipped - 6 lines]
> gauge goes down slowly to below Cold (C) and the heat goes down with it.
> I have replaced the thermostat and the coolant has been flushed.

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JimV - 22 Dec 2004 00:55 GMT

> My wife's 96 maxima has a similar problem. The A/C works great in the
> summer but never reaches operating temperature and has NO heat in
[quoted text clipped - 32 lines]
>
>>I have replaced the thermostat and the coolant has been flushed.

Replace the thermostat

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Chris H. - 22 Dec 2004 01:17 GMT

Replace the engine temperature sensor. Located above the thermostat
housing, it's the one pointing toward the rear. I had the exact same
problem. Make sure your thermostat is a Nissan type and that it's new.
That should fix you up!

Chris
90 & 94 GXE's

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gen1 - 23 Dec 2004 15:03 GMT

Simple test to see if you have to replace the thermostat.

With the engine cooled right down (overnight is great),
take the radiator cap off, and start the engine. If you see coolant
flowing in the radiator, the thermostat is frozen open.

Remember that the OEM thermostat is a "safety" type if it fails it fails
wide-open.

regards
bob

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