heater problems

[Nahkapohjola]

Originally Posted by James218

Ok I repaired the vaccum hose, that didn't work. So I completely took out the doe valve (cabin valve) and put in a plane old manual valve, from a water heater, heat still doesn't work. The heat will put out if your cruisen down the road in 2nd gear reving the engine to 4 grand, the heater will blow really hot air, but as the rpms drop so does the heat ( heat doesn't drop right away but eventually.)

My next step is to work the bubbles out (if any) if that doesn't I'll take it to some place and get it flushed, I've heard of getting it mechanically flushed or something, I don't know but we'll see. I'll also replace the hoses, I'm sure that couldn't hurt.

1. So now u get hot air when pump is working harder. Get the air out.

2. "I'll take it to some place"... 'Some places' do not help, getting air only helps... Read this chain from start, u can do it uself:

- There is a bleed valve; open it slightly so that its bleeding a little, drive one hour (keep water level up). This will get all 100% air out.
- If no valve found, loosen the hose a tiny bit to make a leak for air to escape...

[maxwater]

Try just flushing the heater core itself. Find an easy access point to the inlet and outlet hoses and hook a garden hose up to flush it. That puts a lot more pressure through there than the system can alone. I just did this the other day on my maxima because I had no heat either and know it works fine. Its kind of messy though.

[Ones&zeros]

Where Exactly Is This Heater Core, & I Might Check The Heater Control Knob, & Leak Air Out.

[Ones&zeros]

Ill Tell Him About The New Or Used Radiator He Has To Buy, Eventully Hell Nedd It Anyways. Thank For The Input. Nahkapohjola

[Nahkapohjola]

Originally Posted by Ones&zeros

Where Exactly Is This Heater Core, & I Might Check The Heater Control Knob, & Leak Air Out.

The cabin heater core is deep under the dashboard. The watertubes come through from the engine compartment wall, on passenger side. Open tubes and flush with garden hose...

Maxima has lots of tiny warming hoses for example to throttle & Idle assy, look for fingerthick warm rubber hoses near the aluminium intake manifold. These may be for unknown curvy reason having the bubbles locked. Loosen one hose there also to produce a tiny leak.

[James218]

Okay heater is working fine now. air bubbles were the problem. Thank you all for your help.

[Nahkapohjola]

Originally Posted by James218

Ok I repaired the vaccum hose, that didn't work. So I completely took out the doe valve (cabin valve) and put in a plane old manual valve, from a water heater, heat still doesn't work. The heat will put out if your cruisen down the road in 2nd gear reving the engine to 4 grand, the heater will blow really hot air, but as the rpms drop so does the heat ( heat doesn't drop right away but eventually.)
My next step is to work the bubbles out (if any) if that doesn't I'll take it to some place and get it flushed, I've heard of getting it mechanically flushed or something, I don't know but we'll see. I'll also replace the hoses, I'm sure that couldn't hurt.

Somebody said that their pump was rusted off, the small wings in the rotor vanished. Weird problem, but possible. I guess its boiling in the winter...

Hot/Cool via insulation, see my page:
http://www.cardomain.com/memberpage/748507/1