Kitchen and Health are composite to each other and any defect here always effects on Health of the inmates in either way. This is the place from where we get moral and physical energy.
And there is thought
“What-ever We Take Food So Become Our Thoughts”
Kitchen is totally in command and control of women of the family, so any Vaastu defect here adversely effects on Women of that family.
According to Vaastu Shashtra, the left part of the body is cooling and the right part of the body is hot, this applies on House Vaastu also.
According to Vaastu-shastra, drinking water [Cooling element] should be placed in Northeast direction means in left hand side.
Fire (Hot element), Gas stove should be placed in the right-hand side, means in Southeast of corner the kitchen. Assuming the women is facing East while cooking.
As if the Sink [Water] of the Kitchen in Southeast direction and Gas stove [Fire] placed in the North or Northeast direction then, the inmates have to face the situation of non-repayment of loans in their life.
Placement of Kitchen and effects:
South direction:
Kitchen in South direction and the cooking women if faces South then, Heat related health problems can be develop in the family, like high BP, Arthritis, Diabetes, Joint pains etc.
Southwest direction:
Southwest kitchen and the cooking women is facing South then, there may be hot arguments in-between the couples. Whereas if the cooking women facing West, that leads to Struggle full life.
The values will depend on the patience in the family, but the effect of the wrong placement should always be there.
West direction: 
Kitchen in West direction and the women facing West while cooking, this can add the hardship [financial distress] in the life of inmates.
Northwest:
If the Kitchen is in Northwest direction, the expenses could be more than Income [earning].
North:
North kitchen and cooking women facing North, then there are chances of sudden losing the money, though your earning is very good. This situation will be like burning a Money.
Northeast direction:
This is the direction of God [Eswar] and the place of prayer. Kitchen in this direction can makes the life over loaded with many obstacles in life and career.
East:
Kitchen in East will give satisfactory gains but there will be lack of happiness in such house.
These illustrations are just to check the expected impacts of the Kitchen. It is not essential that everyone should face listed effects.
The impact could be varies person to person depending up-on Sanchit and Prarabdha Karma.