Does the Lambda relay always get hot?

[AugustneverEnds]

My D has been the recipient of a lot of electrical repairs in the past couple of days. Went out driving this morning and decided to stop and have a look around the relay compartment. The lambda relay was noticeably hot, hot to the touch not enough to burn my finger but hot nonetheless. Is this normal function?

(Some background: replaced the alternator last week because the PO installed the last one incorrectly and caused the positive terminal to break. Replaced all of the changeover relays with DMCH's kit. Running a new lamp delay module. The car didn't seem to like the new RPM relay so still using the old one. Also want to give a shout out to DMCMW for their sterling advice which saved me a considerable amount of money

[sdg3205]

Is the FV buzzing? I noticed the same on my new project car, but the FV is not buzzing. I haven't dug into that system yet. It got hot within about 20 seconds.

[Bitsyncmaster]

Yes it is normal for the Lambda relay to get hot. It's just that the coil current is higher than the other relays (except the RPM relay which is even higher). That was the second relay I made solid state because like you, I felt around for hot components.

[AugustneverEnds]

Yes it is normal for the Lambda relay to get hot. It's just that the coil current is higher than the other relays (except the RPM relay which is even higher). That was the second relay I made solid state because like you, I felt around for hot components.

Ohhh I see, thank you Mr. Dave. I might buy one of yours then since I'd like to keep the relay compartment as cool as possible.

[Bitsyncmaster]

Ohhh I see, thank you Mr. Dave. I might buy one of yours then since I'd like to keep the relay compartment as cool as possible.

You can move one wire and use the standard relay in the Lambda location. I don't sell a solid state relay built for the stock wiring of the lambda socket.

[JohnZ]

Probably this question has been already put around here, but... are there some tips to actually cool down the entire relay compartment?

Maybe some different solution mixed together... replace wooden cover for example?

[AugustneverEnds]

Is the FV buzzing? I noticed the same on my new project car, but the FV is not buzzing. I haven't dug into that system yet. It got hot within about 20 seconds.

Yep, FV is buzzing.