Aquahot Webasto Burner Controller Repair

[robertmrankin6612]

Hi Folks,

I just repaired two webasto burner controllers, one from my 05 Dynasty, and one from my buddy's 02 Windsor.

These are the metal can controllers. They are somewhat straight forward to work on, if you are electrically inclined, and have a good solder station or pencil tip 25 watt iron. I have no special knowledge (well, I do have a Ham radio lisc.), but I took mine apart just to look at it, thought the relays looked good, didn't see any burned spots on the board, so I decided to just replace the 6 caps on the board. That was all that I did to get both controllers working again. YMMV

I bought the caps from Mouser, here is what I bought for each controller, all I did was match the capacitance, voltage, size and form:

2 220mf 16V 20% axial; #594-2222-021-35221
2 10mf 63V; #594-222-030-38109
1 470mf 25 VDC; # 667-EEU-FR1E471B
1 100mf 25V: # 667-EEU-TA1E101BJ

The caps cost about the same as the shipping.

Cheers
Bob

[Jim Pratten]

Good job and thx for sharing. What model controller(s) were they?

[Ivan K]

Great info, thank you. I always assumed these were used for the timer circuits and could not read some of the markings so this helps when the time comes. 

[robertmrankin6612]

Hi Jim,

 

I don't have one near me, but they are the standard ones that have been supeceded by the plasctic cover ones being currently sold.

[Jim Pratten]

Previous owner had a rebuilt system installed several year back. Assume this is the plastic case you’re referring to and likely of different circuit design. 

[robertmrankin6612]

I think that's the one.  The plastic cased ones like your picture I'm told are solid state, and not repairable.  The metal can ones are more old school analogue......

[vito.a]

Wow, that's great information.  

 

Edited August 1, 2023 by vito.a

[timaz996]

Thank You Very Much For All of The Information Bob!