I have two electrical wall heaters. The coils in one flip Vibrant orange. The other one particular does not. Is this safe?

Query by faridzadeh: I have two electric wall heaters. The coils in 1 turn Vibrant orange. The other a single does not. Is this protected?
I have two electric wall heaters (brand new Cadet SL sequence) and the one in the bed room heats up nicely. I just lately seen the coils in the unit in the den turns a brilliant orange. More so on the correct side, than the left facet, almost as shortly as I turn it on. I went to the a single in the bed room to see if it did that also, but there in no orange

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