Solid-State Cooling Fan Relay
#31
Glad to hear about the quick sellout on the 1st batch! I have an early car, but am running the late model fan setup with two fans...Presumably this would work for my car? diagnostic version? thanks
#33
The Solid-State Cooling Fan relays are expected to be back in stock in 4 to 6 weeks. The main holdup is the enclosures that are manufactured in Germany and are basically made to order. I have asked for them to be expedited and I am told they will "make delivery asap". You can send me an email and I will put you on the backorder list to be notified as soon as they are available to order.
- Joe
- Joe
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#35
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From: Tampa, FL
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SeaCay (09-06-2021)
#36
Solid-State Fan Relays Now Availbe
Hi Everyone,
I just wanted to announce the Solid-State Fan Relays are now in full production and available on the website.
Best Regards,
Joe Baumbach
I just wanted to announce the Solid-State Fan Relays are now in full production and available on the website.
Best Regards,
Joe Baumbach
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DeanErb (01-24-2022)
#38
After more than a year of development, I finally completed the Solid-State Cooling Fan Relay for the late model 944 and 968! This relay is specifically designed for dual cooling fan equipped vehicles. I am still working on one for single fan vehicles. I made two versions of it, “Standard” and “Diagnostics.” The standard version is a direct replacement for the factory mechanical relay. The diagnostics version has buttons and LEDs to quickly verify and diagnose cooling fan functionality.
Here are pictures of the two Solid-State Cooling Fan Relays side by side:
Below are internal pictures of the new F9T Solid-State Cooling Fan Relay next to various original mechanical cooling fan relays. As you can see, the “Cooling Fan Relay” actually has several “internal relays.” Each fan has a dedicated relay for low-speed and high-speed operation. However, the earlier versions have a fifth internal “control” relay that was later replaced with numerous electronic components. The factory went through several updates to the dual fan relay with the latest version being “04.” Obviously, the F9T relay takes a more modern approach. The mechanical relays are replaced with four independent “smart” power switches. These power switches are designed to drive inductive loads such as automotive cooling fans or smaller starter motors.
Here are pictures of the two Solid-State Cooling Fan Relays side by side:
Below are internal pictures of the new F9T Solid-State Cooling Fan Relay next to various original mechanical cooling fan relays. As you can see, the “Cooling Fan Relay” actually has several “internal relays.” Each fan has a dedicated relay for low-speed and high-speed operation. However, the earlier versions have a fifth internal “control” relay that was later replaced with numerous electronic components. The factory went through several updates to the dual fan relay with the latest version being “04.” Obviously, the F9T relay takes a more modern approach. The mechanical relays are replaced with four independent “smart” power switches. These power switches are designed to drive inductive loads such as automotive cooling fans or smaller starter motors.
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Tiger03447 (02-11-2022)
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J1NX3D (02-11-2022)
#41
Here is a video a customer created that does a great job explaining this feature while demonstrating it in real time:
-Joe Baumbach
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J1NX3D (02-11-2022)
#42
- Joe Baumbach
Last edited by Ftech9; 02-11-2022 at 11:40 AM.
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#43
This is something I intend to look into. I believe the early 944 fan relay is just a relay without any control logic build into it like the later model relay. It may not be appropriate to try to adapt the late model SSFR (Solid-State Fan Relay) to the early 944. Because of this, I may just create a direct fit replacement. I will try to get some sample enclosures and build some prototypes in the second half of this year.
- Joe Baumbach
- Joe Baumbach