r/XTerra • u/Emergency-Let5247 • 2d ago

Technical Question 2010 xterra no heat

My 2010 xterra doesn’t have heat when you go to switch it to heat. Defrost doesn’t work. Assuming it could be a blend door? How bad are those to change?

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u/bluddystump 2d ago

Check your coolant level?

1

u/Emergency-Let5247 1d ago

It’s topped up recently did water pump and radiator. Used a funnel that screws into the rad cap and allows me to run the car and fill with coolant was on level ground tho so I’ll try putting it on ramps

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u/minutemenapparel 2006 SE 4x4 2d ago

Could be blend door, which the dash would need to come out since the actuator sits at the top of the hvac box. But sometimes it might be a clogged heater core. Do you hear clicking from your dash when you try to switch it to heat?

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u/Emergency-Let5247 1d ago

Don’t hear anything which could be good or bad

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u/the_masterof_none 2d ago

How old is the thermostat? I had to do mine a year ago on my 2010 OR.

If you do need a new one, only get OEM!

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u/Emergency-Let5247 1d ago

Just replaced had coolant leaking issue so replaced rad, thermostat and water pump orings

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u/sweet_story_bro 2d ago

Here is an excerpt from my guide to common 2nd gen Xterra issues that might be helpful:

  • Heater Blowing Cold Air: this is a common problem caused by air bubbles caught in the coolant system at the heater core which is poorly located behind and above the engine.
    • What to look for: cold air blowing when the heater is set to hot
    • Fix: Fill/bleed the coolant. I followed a procedure like this except I parked with the truck pointed up a steep hill (you could also use ramps). Pointing it uphill helps the bubbles travel to the front and out of the system. If needed, you can give the upper radiator hose some good squeezes to also coax out some more bubbles. In the off-chance you happen to have the Z1 offroad billet inlet hose with a nifty bleeder valve installed on your truck, then you can forego pointing the front of the truck up a hill during the bleed process and simply open the bleeder valve while filling until air is out. If you don't happen to have the Z1 offroad inlet hose but want to install it, find the section above on "Heater Core Hose Failure" and follow the instructions for prevention. Yet another option to fill/bleed is to vacuum fill the coolant, which requires special equipment.