Thermostat location and replacement?

I'm having the same issue.I need to set it to heat for the winter. I had my mechanic do it last year but he's unreachable now. For heat do I pull or push the cable? Could you give me step by step directions? Thank you so much, Marcie

I need to replace the thermostat on my Nissan Altima. Can you tell me where the thermostat is and give me some info on how to replace it. Thank you!

How do I replace the thermostat in a 2000 NIssan Altima? Is it difficult for someone who has done little mechanical work? Where do I find instructions?

Install thermostatic on nissan alt

I replaced my radiator and thermostat after the old radiator cracked, but I used a Gates 180° thermostat instead of the OE 170° thermostat. Since installing it 3 days ago, I've only been able to get the thermostat to open once, when it was a sunny warmer day. Lately on cooler days (50°) the thermostat does not even open while driving uphill at high rpm (lower radiator hose stays very cool), and the engine doesn't seem to get very hot at all (the fan blows quite a bit though). Meanwhile since the thermostat isn't opening, it seems like my upper and lower radiator hoses are bulging with pressure since the coolant isn't circulating through the thermostat--can it sustain that? At the same time, I've noticed that even though the engine is warm, the heater takes awhile to put out heat, and sometimes intermittently puts out very warm heat or no heat. Could there still somehow be more air in the system causing that heater problem, or something else (vacuum?) Causing it? (I already followed the instructions using the air bleed bolt, etc to remove the air from the coolant system.)

The title should have said "heater NOT consistently putting out heat!"

After a bunch more trial runs and trying to get air out of the system (the hoses are brand new BTW, and not exactly bulging I guess), I've found that sometimes both heater hoses are hot with the heater on, and sometimes only one is hot. With the front of the car jacked up, running the vehicle shows a constant stream of bubbles gurgling into the coolant reservoir, and the car seems to maintain normal temperature fine. Could air be being pulled into the heater control valve or somewhere, causing air in the system constantly? But there doesn't seem to be any coolant leaking anywhere. I don't know why the heater problem is only intermittent. Haven't seen any fogging inside the vehicle (which would indicate leaking heater core).

Also, there is no coolant in the oil, and no sign of coolant being burned in the exhaust.

(oh, and the thermostat is opening fine, it just takes a lot of revving to heat things up enough since it's a 180-degree thermostat.)

Thanks for the tips, I followed the instructions with the stock thermostat, but it still had constant bubbling in the coolant reservoir. A block tester kit revealed exhaust gases in the coolant. Guess it's time for a new head gasket even though there were no obvious symptoms.

I had a shop do the job and they had the head pressure tested and machined and said everything else was good besides the slightly failing head gasket. Seems to be running fine without the air now!

1995 Nissan Altima 155000 miles

engine will not heat up in cold weather. Thermostat replaced twice. Fluid level has been chkd. New radiator installed for an un related problem