I have a question: generally when is the secondary fan suppose to kick in?

i have noticed that mine will only do it some times.

second question.

can i wire the fan to always be on when the car is on? i don't want any cooling issues. is that plausible? i have noticed my temp go up ever so slighly but im not hearing my fan come on when the at a light or even when the car is fully warmed up and i turn the engine off but the leave the key in the "on" position like it use to.

thank you

 

Better description needed...unsure what a "secondary fan" is.

Running the fan straight off the ignition (i.e., "always on") is ridiculous and intentionally disables one major advantage the efan has over the stock thermoclutch.
My fan low speed triggers on at 195°...it hasn't come on since November.
Until ambient reaches @60° the car just doesn't require a fan.
I can't really tell when it does come on anyway. If it weren't for the temp gauge falling, I'd never know.

 

I belive he's referring to the electric auxiliary fan in front of the condenser.

 

its an 89 t2. aside from the clutch fan there is a secondary fan mounted on the out side of the radiator. see attached picture. shows as electric cooling fan. sorry if i got the terminology wrong. but that fan use to come on when i was sitting at a light or in traffic. i would assume if the engine started to heat up the fan is suppose to come on to regulate the temp in the cooling process. it doesn't come on. and coolant isn't being sucked to and from the reservoir.

 

yes. indeed i am. i have check the cooling system at 15 psi and it holds so i dont think the issue of cooling is that. less it could be that tstat i replaced from autozone still not doing the job right.

 

There should be a sensor with a pin pointing up near the thermostat housing. That's your fan switch. If it's working fine (FSM has test procedure of putting it in a pot of water with a thermometer), let it do its job and it will turn on the fan only if needed. I believe it should turn on the fan if you ground the wire to the sensor with ignition on, if the rest of the circuit is fine (relay, wiring, etc.).

No need to wire it constantly on as mentioned. And your terminology is correct. Not all cars had the secondary electric fan.

Is your temp. showing around half way at most?

 

it could be an bubble im assuming. as i will get a quick buzz from the add coolant warning. but it will subside. and sometimes it wont. the temp gauge goes up ever so slightly and will sometimes quickly go back down to normal. it will change temp rather quick. once i see it go any further than normal i shut off the engine. wait a bit and all is normal. but usually the secondary fan would be on at this time. im going to try to ground it like you said and see if that could be my issue. unless its still the t-stat. is there any issue running a t2 without one? i use to run without tstat on my na and it ran fine.

 

Factory T-Stats are the only real viable option for these cars.

 

then that could be my issue. i will order one from mazdatix. in the mean time can i remove the tstat without issue?

 

i always thought that fan only came on with the AC

 

no. the reason we can't run aftermarket thermostats is that most engines have a thermostat bypass hose, to let the water pump pump water when the thermostat is closed, and the rotary has a port under the thermostat to do this.

when the Mazda thermostat opens, it also closes this port, aftermarket ones don't, and this lets the cooling water just circle around the engine instead of going through the radiator like we want it too

 

so i should get the tstat from mazdatrix then?

 

Or the dealership or whoever supplies them.

 

Oem thermostats are always the best safest option, for any car aftermarket ones could be used also. I got a stant one and it had no breeder hole like my oem one did. Stant one looks cheaper made also.