removed dvd drive, now fan goes on indefinitely

HI

i had to remove a faulty dvd optical drive due to crazy noise, iam planning to order a replacement but what is happening now is tat the fan is going at full speed, right from the start up, is this normal?

hi i have a iMac 24 inch (white) 2.33Mghz core 2 duo, ((((i dont see no ECM number on the label so i cant say if i am giving you correct info)))

Here is what was in my system profile:

Computer details

Model Name: iMac

Model Identifier: iMac6,1

Processor Name: Intel Core 2 Duo

Processor Speed: 2.33 GHz

Number Of Processors: 1

Total Number Of Cores: 2

L2 Cache: 4 MB

Memory: 2 GB

Bus Speed: 667 MHz

Boot ROM Version: IM61.0093.B07

SMC Version (system): 1.10f3

PIONEER DVD-RW DVR-K06:

Firmware Revision: Q609

Interconnect: ATAPI

Burn Support: Yes (Apple Shipping Drive)

Cache: 2000 KB

Reads DVD: Yes

CD-Write: -R, -RW

DVD-Write: -R, -RW, +R, +R DL, +RW

Write Strategies: CD-TAO, CD-SAO, CD-Raw, DVD-DAO

Media:

Type: DVD-R

ID: MCC 03RG20

Blank: No

Erasable: No

Overwritable: No

Appendable: No